Chain Alcohols Research Articles

Changing absorption intensity ratios for methylene violet Bernthsen in normal alcohols and at different temperatures

Absorption spectra of methylene violet Bernthsen (MVB) are reported, obtained in normal alcohols, methanol through 1-octanol, and at different temperatures, 15 °C to 75 °C. Two distinct absorption intensities are apparent. The 565 nm intensity increases relative to the 598 nm intensity as alcohol chain length increases. For each solvent, increasing temperature causes similar intensity ratio effects. Computational spectra of MVB in methanol indicates a decrease in hydrogen-bonding as temperature increases with a corresponding loss of intensity in the low energy peak consistent with the experimental observations. Hydrogen-bonding is indicated as playing a role in the alcoholic solvent effects.

Comparative study of calorific value of rapeseed, soybean, jatropha curcas and crambe biodiesel

Biodiesel is a mixture of esters of short chain alcohols, produced as an alternative fuel for mineral diesel substitution. It is originated from renewable sources (fats and oils) and is less pollutants. But for its implementation, it is necessary to analyze some important quality parameters. A very important fuel`s feature is the calorific value, which represents the amount of heat transferred into the chamber during the combustion and indicates the available energy in fuel. The calorific value is obtained experimentally using a calorimetric bomb. The higher the calorific value, the higher is the yield of the fuel. The aim of this study is to determine the calorific value of rapeseed, soybean, jatropha curcas and crambe biodiesel using a calorimetric bomb. The results were associated with the ethyl ester composition of each biodiesel. The crambe biodiesel shows the highest calorific value (∆H= 40564 J g-1) influenced by the high amount of long chain ethyl ester originated from behenic acid (C22:0) that composes 57.2% of crambe oil. The rapeseed, soybean and jatropha curcas biodiesel that exhibit approximately the same amount of long chain ethyl ester showed calorific values near to ∆H= 39450 J g-1.

Solid-Liquid Equilibrium Study of Binary System Saturated Fatty Acid in Short Chain Alcohols

Unsaturated fatty acids are potential to be used for preventing degenerative diseases and developing brain function in babies. Separation of unsaturated fatty acids from saturated fatty acids efficiently achieved by urea complexation fractionation method. It is considered to be the simplest, most efficient, and lowest cost method. This study aimed to optimize urea complexation for increasing PUFA concentrations by determining solid-liquid equilibrium data of saturated fatty acids in short chain alcohols. In this study, there were two types of short chain alcohol, methanol and ethanol, in various concentrations (99,7%; 95%; 88%; 76% w/w) towards the solubility of saturated fatty acids, palmitic and stearic acid (PA and SA). PA and SA dissolved in various concentration of methanol and ethanol to get homogeneous solutions. When solid SFA disappeared by heating the solution, or first formed by cooling the solution, the temperature was determined as the solid-liquid equilibrium temperature. The results showed that the best composition of solvent within high solubility level is ethanol 95% and methanol 99,7% over palmitic acid because it can dissolve at room temperature and below 0.01 mole fraction.

Pyrolytic decomposition of methanol, ethanol, and butanol at various temperatures and residence times in a high-temperature flow reactor

The potential use of low-carbon renewable fuel molecules, such as short chain alcohols, as a substitute or extender for fossil fuels, offers an opportunity to address pollutant emissions from transport and the sustainability of energy sources. Moreover, it may help reduce pollutants detrimental to air quality and human health, of which particulate matter (PM) is a significant contributor. To this end, the pyrolysis of three renewable alcohol fuels, methanol, ethanol, and butanol, has been studied in a laminar flow reactor at a sample inlet temperature range of 869 0C to 1120 0C. All the tested fuels were injected into a nitrogen carrier gas stream at a fixed concentration of 10,000 ppm on a carbon atom basis. A range of pyrolysis temperatures and residence times were selected so as to gain insight into the pyrolytic decomposition of short chain alcohol fuels to intermediate species important to the subsequent formation of benzene rings, larger polycyclic aromatic hydrocarbons (PAH), and particulate matter. In this paper, the presence of ten intermediary species that may aid in the formation of benzene rings and the growth of PAHs were quantified, with an emphasis on probable routes of first ring formation from the alcohols of varying chain length. Gaseous samples were collected from the pyrolyser at different temperatures and residence times using a novel high-temperature air-cooled ceramic sampling probe. The identification and quantification of intermediate gaseous species were undertaken by Gas Chromatography-Flame Ionization Detection (GC-FID). During methanol pyrolysis, only a tenth of the supplied carbon was detected as hydrocarbon gaseous species (mainly methane), with no benzene found, highlighting that methanol pyrolysis does not readily result in polyaromatic hydrocarbons and soot. Ethanol and butanol pyrolysis produced substantial amounts of ethylene and acetylene, suggesting a role in benzene and soot formation. Uniquely, pyrolysis of the longest chain alcohol, butanol, produced appreciable levels of C3 and C4 hydrocarbons, in addition to C1 and C2 hydrocarbons, suggesting additional reaction pathways for benzene formation and growth in comparison with ethanol.

The influence of the molecular chain length of PVA on the toughening mechanism of calcium silicate hydrates.

In recent years, polymers have been demonstrated to effectively toughen cementitious materials. However, the mechanism of interaction between the polymers and C-S-H at the nanoscale remains unclear, and the quantitative impact of the polymer chain length on toughening effectiveness is lacking in research. This study employs molecular dynamics techniques to examine the impact of the polyvinyl alcohol (PVA) chain length on the tensile performance and toughening mechanism of C-S-H. The toughening effect in both the X and Z directions exhibits an initial enhancement followed by a decline with increasing chain length. The optimal degrees of polymerization are determined to be 8 and 12 in the X and Z directions, respectively, resulting in an improvement of fracture energy by 146.7% and 29.5%, respectively. During the stretching process along the X and Z axes, the chain length of PVA molecules significantly influences the variation in the number of Ca⋯O bonds in the system, leading to different stress responses. Additionally, PVA molecules form C-O-Si bonds with the silicate layers of C-S-H, bridging the adjacent layers in a left-right or up-down manner. The toughening effect of PVA on C-S-H depends on the behavior of PVA molecules with different chain lengths, and there exists an optimal range of chain length for PVA, enabling it to enhance structural uniformity and adjust its own conformation to absorb strain energy. When the length of PVA molecular chains is too short, it can easily cause stress concentration in the system and its connection with silicates is not significant. Conversely, when the length of PVA molecular chains is too long, the large molecular structure restricts its extension in the defects of C-S-H, and as the stretching progresses, PVA molecules break and form numerous small segments, thereby losing the advantage of the chain length. This study provides a theoretical basis for the ability of polymers to toughen cementitious materials.

The potential of native and engineered Clostridia for biomass biorefining.

Since their first industrial application in the acetone-butanol-ethanol (ABE) fermentation in the early 1900s, Clostridia have found large application in biomass biorefining. Overall, their fermentation products include organic acids (e.g., acetate, butyrate, lactate), short chain alcohols (e.g., ethanol, n-butanol, isobutanol), diols (e.g., 1,2-propanediol, 1,3-propanediol) and H2 which have several applications such as fuels, building block chemicals, solvents, food and cosmetic additives. Advantageously, several clostridial strains are able to use cheap feedstocks such as lignocellulosic biomass, food waste, glycerol or C1-gases (CO2, CO) which confer them additional potential as key players for the development of processes less dependent from fossil fuels and with reduced greenhouse gas emissions. The present review aims to provide a survey of research progress aimed at developing Clostridium-mediated biomass fermentation processes, especially as regards strain improvement by metabolic engineering.

Study on Marangoni explosion of binary mixtures in liquid layer

In this work, the process of forming micro-droplets due to instability and fragmentation after short chain alcohol solution spreads on the surface of oil layers is studied. Based on the free energy theory of the liquid-liquid interface, the relationship between the binary mixtures spreading on the surface of the liquid layer is derived, and the concentration range of short chain alcohol solution spreading as a thin film on the surface of the oil layer is calculated from the Hiskovsky formula. The Malangoni flow caused by the difference in evaporation rate between the center and edge of the droplet film perturbs the boundary of the liquid film, causing finger-shaped liquid columns to grow at the edge when the droplet spreads to its maximum. In this work, the expression for the critical wavelength and maximum wavelength of boundary instability are derived based on the perturbation model, and the reason for finger shaped liquid column fragmentation is explained based on the Plateau Rayleigh instability. A concentric cylindrical shell liquid column model is established to simplify the calculation and predict the location range of “droplet explosion” of droplets with different viscosity ratios on the liquid layer. Through theoretical calculations and experimental verification, it is found that the alcohol solution fragmented into small droplets within a length range of 4.51–5.98 times the width of the liquid column. This study provides theoretical guidance for existing application fields such as film forming technology and coating technology. The hypotheses, assumptions, and simplified models preliminarily verified experimentally provide solutions for some technical difficulties in the research fields of micro reactions and nanoparticle preparation in chemical industry.

Excellence in Acrylation - Scope and Limitation of Glucosyl Imidazolium-coated Novozym 435 Catalyzed (Meth)acryl Ester Synthesis.

The incorporation of carbohydrate based ionic liquids as a support for Novozym 435 was previously studied by the authors for the acrylation of n-butanol as the target substrate, which was used as the foundation for the design of experiments. The combination of carbohydrate based ionic liquids and Novozym 435 remains a key aspect of this work. Building upon this, the reaction parameters were optimized for the Novozym catalyst. Substrate screening was performed to explore the scope and limitations of room temperature acrylation reactions. Herein, different alcohols and reaction conditions were screened extensively for the different acrylate products with yields of up to 99.9 % determined via gas chromatography (GC). Standard straight chain alcohols, 2-functionalized ethanol derivatives with electron donating and withdrawing groups, and more sterically challenging substrates were investigated over a broad concentration region. To further underline the applicability of the modified biocatalyst, two alcohols were converted with methacrylic acid. The presented method offers a greener pathway for acrylate synthesis, which eliminates the need for high reaction temperatures, strongly acidic catalysts and/or polymerization inhibitors as used in non-biocatalytic acrylate synthesis.

Cloudy development and physico-chemical parameters for the triton X-100 and levofloxacin hemihydrate drug mixture: Impacts of the manifestation of several short-chain alcohols and urea

Interests on physico-chemical behaviors of surfactant-drug systems in various additives media have increased considerably in recent years owing to their extensive applications in pharmaceuticals and other industrial sectors. LFH is a quinolone-type antibiotic which frequently used to treat a variety of bacterial diseases. Herein, the cloud point (CP) behavior and thermodynamic characteristics of triton X-100 (TX-100) and levofloxacin hemihydrate (LFH) antibiotic drug mixtures in attendance of alcohols and hydrotrope (urea) have been investigated. Different organic additives such as methanol (MeOH), ethanol (EtOH), 1-propanol (1-PrOH), 2-propanol (2-PrOH), 1-butanol (1-BuOH), 2-butanol (2-BuOH), and urea with various concentrations were used to examine their effects on variation of CP in the respective systems. In all experiments, concentrations of TX-100 and LFH were remained the same which were 92.7 mmol kg−1 and 0.5 mmol kg−1 respectively. The magnitudes of CP in TX-100 + LFH mixtures were found to be decreased sharply in the manifestation of alcohols and urea in comparison to those observed with the aqueous system. The CP values in the TX-100 + LFH system were varied with increasing in concentrations of alcohols and urea which followed the order of CPH2O+2-PrOH>CPH2O+EtOH≈CPH2O+MeOH≈CPH2O+Urea>CPH2O+1-PrOH>CPH2O+2-BuOH>CPH2O+1-BuOH. Lower carbon chain alcohols in the structural moieties (MeOH, EtOH, 1-PrOH, 2-PrOH) acted as CP promoter whereas other longer chain alcohols (1-BuOH, 2-BuOH) caused the significant decrease in CP within the respective system. Higher CP values were also noticed in TX-100 + LFH system when aq. hydrotrope urea was used as additive. The Gibbs free energy change (ΔGco) were found to be positive which revealed the nonspontaneous nature of clouding in the studied system. However, the degree of non-spontaneity was reduced by the enhancement of alcohols and urea concentrations. Appearances of positive enthalpy (ΔHco), and entropy (ΔSco) in TX-100 + LFH mixtures with different additives indicated the existence of hydrophobic interactions among the participated constituents whereas the negative magnitudes of ΔHco and ΔSco disclosed the presence of electrostatic interactions among the respective constituents. Entropy-enthalpy compensation parameters were computed and described from logical points.

Metal coordination in polymer drives efficient phonon transfer through self-assembled microstructures

Molecular interactions such as hydrogen bond, van der Waals force, covalent bond in association with heat transfer in polymeric materials have been reported, while the relationship between metal-polymer coordination and thermal conduction has not been studied yet. In this work, the molecularly-assembled microstructure of the composites produced by metal coordination with polyvinyl alcohol (PVA) reveals a qualitative correlation between microstructure and thermal conductivity (TC). The ellipsoid-shaped domain and increased coil size create stable phonon transmission channels, which are beneficial for boosting TC by lengthening the mean free path of phonon propagation. Strong coordination between the metal ions and the hydroxyl groups in the polyvinyl alcohol chains results in competition between the inter- and intra-molecular OH–OH hydrogen bonds, which eventually takes precedence. Such coordination structure creates distinctive micro-crystal domains and is discovered to be essential for TC enhancement. Moreover, the power generation value of thermal conversion using PVA-H/2.0Fe(NO3)3 film is twice that of pure PVA-H film, which has higher and faster conversion efficiency. These materials have been demonstrated as excellent candidates for improving the conversion efficiency of thermoelectric devices. In summary, this work offers a new strategy for regulating TC through metal coordination and a fundamental comprehension of the link between metal coordination, microstructure, and TC in polymer composites.

Experimental research on the explosion boiling mechanism of superheated liquids containing short chain alcohol impurities with different boiling points

This article investigates the mechanism of the influence of impurities in n-propanol and ethylene glycol on the explosion boiling of superheated liquids. The experimental results of studying short chain alcohol impurities showed that after the addition of short chain alcohol impurities, there were significant changes in the pressure response, temperature response, and dynamic evolution of bubble nucleation in the storage tank. Short chain alcohol impurities cause significant changes in the two-phase flow evolution behavior during superheated boiling, thereby promoting the explosive boiling of the superheated liquid. Under pure water conditions, only a small amount of bubbles are generated during the initial boiling stage, and a large number of bubbles are generated in the two-phase flow after the addition of short chain alcohol impurities. The increase in bubble density increases the porosity of the two-phase flow, which in turn affects the pressure response and temperature response inside the tank during the release process.

Engineered Geobacillus lipolytic enzymes – Attractive polyesterases that degrade polycaprolactones and simultaneously produce esters

Plastic pollution is one of the biggest environmental problems plaguing the modern world. Polyester-based plastics contribute significantly to this ecological safety concern. In this study, lipolytic biocatalysts GD-95RM and GDEst-lip developed based on lipase/esterase produced by Geobacillus sp. 95 strain were applied for the degradation of polycaprolactone films (Mn 45.000 (PCL45000) and Mn 80.000 (PCL80000)). The degradation efficiency was significantly enhanced by the addition of short chain alcohols. Lipase GD-95RM (1 mg) can depolymerize 264.0 mg and 280.7 mg of PCL45000 and PCL80000, films respectively, in a 24 h period at 30 °C, while the fused enzyme GDEst-lip (1 mg) is capable of degrading 145.5 mg PCL45000 and 134.0 mg of PCL80000 films in 24 h. The addition of ethanol (25 %) improves the degradation efficiency ~2.5 fold in the case of GD-95RM. In the case of GDEst-lip, 50 % methanol was found to be the optimal alcohol solution and the degradation efficiency was increased by ~3.25 times. The addition of alcohols not only increased degradation speeds but also allowed for simultaneous synthesis of industrially valuable 6-hydroxyhexonic acid esters. The suggested system is an attractive approach for removing of plastic waste and supports the principles of bioeconomics.

Theoretical investigation of the selectivity of alcohols and aldehydes on Co-based catalysts in syngas conversion

Syngas conversion to long chain alcohols and aldehydes by Co-based catalysts offers green route for synthesizing value-added chemicals. Cobalt carbides (Co2C) has been proven promoting oxygenates formation, and the Co/Co2C interface exhibited synergetic effects on increasing selectivity of higher alcohols. However, the underlying mechanism that determines the ratio of aldehydes and alcohols in oxygenate products is less understood. In this work, the hydrogenation of oxygenate intermediate was studied from first principles on metallic Co, Co2C surfaces and Co/Co2C interface to investigate the formation processes of alcohols and aldehydes. First-principles calculations show that: On Co2C(111) facet of Co2C nanosphere, aldehyde desorption as the final product has a slight advantage over its subsequent hydrogenation to alcohol; hydrogenation of oxygenate on Co2C(020) facet of Co2C nanoprism is difficult, whereas aldehyde on Co2C(101) facet of Co2C nanoprism is very easy to be hydrogenated to alcohol; and the synergistic effect between metallic and carbide surfaces on the Co/Co2C interface model promotes the selectivity of alcohol as the final product during hydrogenation of oxygenate intermediates. This study provides theoretical insights into the rational design of catalysts for controlling the selectivity between aldehydes and alcohols in syngas conversion to oxygenates.

Escherichia coli displays a conserved membrane proteomic response to a range of alcohols

BackgroundAlcohol is a good and environment-friendly fuel that can be microbially produced, capable of eliminating many of the limitations of the present-day fossil fuels. However, the inherent toxic nature of alcohols to the microbial cells leads to end-product inhibition that limits large-scale alcohol production by fermentation. Fundamental knowledge about the stress responses of microorganisms to alcohols would greatly facilitate to improve the microbial alcohol tolerance. The current study elucidates and compares the changes in the membrane proteome of Escherichia coli in response to a range of alcohols.ResultsAlthough alcohol toxicity increased exponentially with alcohol chain length (2–6 carbon), similar stress responses were observed in the inner and outer membrane proteome of E. coli in the presence of 2-, 4- and 6-carbon alcohols at the MIC50. This pertains to: (1) increased levels of inner membrane transporters for uptake of energy-producing metabolites, (2) reduced levels of non-essential proteins, associated with anaerobic, carbon starvation and osmotic stress, for energy conservation, (3) increased levels of murein degrading enzymes (MltA, EmtA, MliC and DigH) promoting cell elongation and 4) reduced levels of most outer membrane β-barrel proteins (LptD, FadL, LamB, TolC and BamA). Major outer membrane β-barrel protein OmpC, which is known to contribute to ethanol tolerance and membrane integrity, was notably reduced by alcohol stress. While LPS is important for OmpC trimerisation, LPS release by EDTA did not lower OmpC levels. This suggests that LPS release, which is reported under alcohol stress, does not contribute to the reduced levels of OmpC in the presence of alcohol.ConclusionsSince alcohol primarily targets the integrity of the membrane, maintenance of outer membrane OmpC levels in the presence of alcohol might help in the survival of E. coli to higher alcohol concentrations. The study provides important information about the membrane protein responses of E. coli to a range of alcohols, which can be used to develop targeted strategies for increased microbial alcohol tolerance and hence bioalcohol production.

Selective and efficient separation of levulinic, acetic and formic acids from multi-acid solutions by adjusting process parameters

This investigation focuses on the recovery of levulinic- (LA), acetic- (AA) and formic acids (FA) from aqueous mixed-acid solutions by reactive extraction using tri-n-octylamine (TOA). Alcohols were found to be the most efficient solvents tested. Recoveries increased with shorter alcohol chain length and higher TOA concentrations. Yields decreased with pH and maximum efficiencies were obtained at the unadjusted pH (1.83) of the ternary-acid solutions for all acids; with LA, maximum selectivity occurred at pH 5. Higher TOA levels enhanced efficiency in mixtures but slightly reduced selectivity. For LA recovery, efficiency and selectivity using 0.5 M TOA in 1-hexanol were 92 % and 23.8 %, respectively. Co-extraction of AA ceased at consecutive extractions (from 2nd to 10th) and 93.6 % of LA was recovered with a selectivity of 98 % after ten subsequent steps. LA in the organic phase was stripped with an efficiency of ~91 % with aqueous 1.0 M NaNO3. Selective extraction of AA and FA from binary-acid solutions was achieved at pH 5. The selectivity and separation factor decreased at higher TOA concentrations; however, 94.2 % of the AA was recovered with a selectivity of 93 % after seven successive extractions, followed by ~93 % recovery by back extraction. The remaining FA (94.2 %) in the aqueous solution had a selectivity of ~95 %. The data show that multi-stage reactive extraction can selectively separate LA, AA and FA from ternary- and binary-acid solutions.

An Indolin‐3‐imine Photobase and pH Sensitive Fluorophore

AbstractThis work presents the pH sensing ability of a fluorescent indolin‐3‐imine derivative. Protonation of the weakly basic imine (pKa=8.3 of its conjugate acid) results in a significant red‐shift of the absorption band. The fluorophore acts as a photobase, with a basicity increase of approximately 6 units upon photoexcitation. This behavior promotes excited state proton transfer from weak acids such as protic solvents. The characteristics of the fluorophore enable sensing of water fractions in organic solvents and differentiation between methanol, ethanol, and longer chain alcohols. Initial cell studies indicated the future potential of indolin‐3‐imines as fluorophores for bioimaging applications.

A Reply to ‘A Note of Caution on the Use of Calcium Nanoparticle Dispersions as Deacidifying Agents’

ABSTRACT The application of Ca(OH)2 nanoparticles dispersed in short chain alcohols to adjust the pH of acidic cellulosic substrates (paper, canvas, and wood) has been introduced and largely assessed in conservation practice, and commercial products are available on the market. Recently, some concerns about this methodology were expressed in a technical note (‘A Note of Caution on the Use of Calcium Nanoparticle Dispersions as Deacidifying Agents’ by Cremonesi (2023)). The main criticism is that carbonation of the hydroxide particles into calcium carbonate could be too slow, and the Ca(OH)2 remaining on the fibers might cause structural damage to cellulose by producing high alkalinity in situ, when water absorbed by the alcohol dispersion or by the cellulose-based support causes dissociation in the nanoparticles. However, in Cremonesi’s note, no accurate description of the application method was given, and some fundamental information already present in the literature was overlooked. Here, we give a rebuttal of Cremonesi’s conclusions, providing: (1) further evidence that the correct application of the particles’ dispersions results in carbonation and in neutral pH values in a few days; and (2) an up-to-date literature survey, in which the Ca(OH)2 nanoparticles’ carbonation kinetics is studied in detail, and potential structural damage to cellulosic materials in an alkaline environment is evaluated and ruled out.

Development and characterisation of novel terpenoid-based hydrophobic deep eutectic solvents for sustainable extraction of bioactive antioxidants from Rosmarinus officinalis L

With the increasing demand for sustainability and green practices in industrial operations, deep eutectic solvents (DES) emerge as promising alternatives to organic solvents for the extraction of bioactive compounds. However, the inclusion of DES in industrial processes is severely limited by their hig density and viscosity as it hinders mass transfer. Additionally, low selectivity towards medium and amphiphilic bioactive compounds leads to unfavourable efficiency. This study aimed to develop, characterise, and evaluate low-density novel terpenoid-based DESs, containing fatty acid and alcohol, as effective hydrophobic extractants. The formation and stability of the newly developed DES were confirmed by validating the hydrogen bonds. The density as a function of temperature was investigated, revealing that all the developed hydrophobic DES had densities lower than water. The polarity of the solvents was assessed as it plays a vital role in the “solvation” of the bioactive compounds through Nile red assay. Although the hydrophobic DES had lower polarity than organic solvents, the screened DES showed a higher extraction yield of amphiphilic compounds of carnosic acid and carnosol, demonstrating their effectiveness. This is due to the high van der Waals interactions between the amphiphilic compounds and the alkyl chain of fatty acids and alcohols in the DES. Overall, the low density and high selectivity of the new hydrophobic DES developed in this study were found to be viable extractants for the sustainable extraction of bioactive compounds, particularly amphiphilic compounds.

Production of Long Chain Alcohols from Waste Polyethylene Pyrolysis Oil Using a One-Pot Hydroboration–Oxidation Process

Production of Long Chain Alcohols from Waste Polyethylene Pyrolysis Oil Using a One-Pot Hydroboration–Oxidation Process

Ethanol Upgrading to n-Butanol Using Transition-Metal-Incorporated Poly(triazine)imide Frameworks.

The upgrading of ethanol to n-butanol was performed using a molecular catalyst integrated into a carbon nitride support, one of the first examples of a supported molecular catalyst performing the Guerbet process. Initial studies using crystalline poly(triazine)imide (PTI) with lithium or transition-metal cations imbedded in the support together with a base as the catalyst system did not produce any significant amounts of n-butanol. However, when using the catalyst material formed by treatment of PTI-LiCl with [(Cp*)IrCl2]2 (Cp* = pentamethylcyclopentadienyl) along with sodium hydroxide, a 59% selectivity for butanol (13% yield) was obtained at 145 °C. This PTI-(Cp*)Ir material exhibited distinct UV-vis absorption features and powder X-ray diffractions which differ from those of the parent PTI-LiCl and [(Cp*)IrCl2]2. The PTI-(Cp*)Ir material was found to have a metal loading of 27% iridium per empirical unit of the framework. Along with the formation of n-butanol from the Guerbet reaction, the presence of higher chain alcohols was also observed.