Nm In Ethanol Research Articles

Adsorption orientation control of porphyrin on titania-nanosheet

In this study, cis-di(N-methyl-2-pyridine)-diphenyl porphyrin (cis-DMPyP2+)was adsorbed on titania-nanosheet (TNS, Ti0.89□0.11O2.000.11− (□: vacant)) monolayer film prepared by Langmuir-Blodgett method. The adsorption behavior such as maximum adsorption density and adsorption orientation change behavior of cis-DMPyP2+ were examined by absorption and dichroic waveguide spectroscopy, respectively. By the adsorption on TNS, the maximum absorption wavelength (λmax) of cis-DMPyP2+ shifted from 421 to 456 nm in water. The maximum adsorption amount without aggregation was ca. 100% vs. cation exchange capacity of TNS. The orientation angle of cis-DMPyP2+ on TNS in water was less than 5°, that is porphyrin plane was almost parallel to the TNS surface. On the other hand, λmax of cis-DMPyP2+ on TNS was 429 nm in ethanol. The adsorption orientation angle of cis-DMPyP2+ on TNS in ethanol was turned out to be 45°. These results indicate that the adsorption orientation angle of cis-DMPyP2+ depends on the solvent. It was demonstrated that the adsorption angle of organic molecules can be controlled on TNS surface by changing the solvent environments.

Amorphous and photoluminescent crystalline silicon carbide nanoparticles synthesized by laser ablation in liquids

Amorphous and crystalline SiC nanoparticles were synthesized via laser ablation of SiC micro-sized powder in water and ethanol. X-ray and HRTM analysis showed the amorphous nature of SiC nanoparticles with an average particle size of 44 nm in water and crystalline 6H-SiC polytype nanoparticles with an average size of 18 nm in ethanol. The direct and indirect bandgap of SiC nanoparticles were determined from UV–visible absorption spectra. PL emission characteristics were studied and crystalline SiC nanoparticles exhibit tunable PL emission covering UV to the visible region.

Analytical techniques for the estimation of zolpidem in tablet dosage form by spectrophotometric method

For the determination of Zolpidem Tartarate in pure formulations and its pharmaceutical formulations, a simple UV-spectrophotometric method was developed. Zolpidem Tartarate exhibited maximum absorption at 244 nm in ethanol and obeyed linearity in the concentration range of 0.5-25 μg/ml. The method proposed was validated statistically. With good accuracy, all the proposed methods are simple, selective, reproducible, sensitive and precise. Some of the methods were proved to be superior to most of the reported methods. Many of these suggested prediction methods for chosen drugs, such as Zolpidem, have been successfully implemented either in bulk or in prescription formulations. The suggested methods can be used in bulk and prescription dosage formulations as alternative methods to the recorded ones for the routine determination of selected drugs in the sample.

Carbon nanoparticles synthesized by laser ablation of coconut shell charcoal in liquids for glucose sensing applications

In this work, Carbon Nanoparticles (CNPs) were synthesized by one step Laser ablation of natural coconut shell charcoal in ethanol and water media. The HRTEM studies showed that the average particle size was of the order of 29 nm in ethanol with amorphous nature whereas in water, the particle average size was about 15 nm with graphitic structure. Photoluminescence (PL) properties of CNPs formed were studied. CNPs coated Nickel foil electrode (NiFE) was investigated for glucose measurement by cyclic voltammetry (CV) and chronoamperometry. The CNPs exhibited good response to glucose. The sensor was stable, wide range of detection and fabricated simply without use of any kind of binder or enzymes.

Effects of solvents on structural, optical and photovoltaic properties of photo anodes for dye-sensitized solar cells

The effect of Polyethylene glycol (PEG) as solvent as compared to the conventional ethanol in synthesis of photo anode for dye-sensitized solar cell (DSSC) applications is studied. The TiO2 paste was later mixed with lignocellulose (LC) and deposited onto FTO substrate to increase porosity and N719 Ruthenium dye was used as a sensitizer. The red-shift was observed in UV–vis for PEG-based thin films. The structural parameters were evaluated using X-ray diffraction (XRD) and RAMAN spectroscopy. The crystallite size varied from 60 to 40 nm for ethanol and 80 to 30 nm for PEG based films, respectively. Raman analysis indicated the shift in the active modes for 194 cm−1 and decrease in peak intensity after doping and dyeing. SEM micrographs indicated non-uniform grain distribution confirms enhanced porosity. Polysulfide was used as electrolyte which showed satisfactory photocatalytic properties. The dye cells prepared in PEG were found more efficient than those prepared in ethanol.

Novel turn-on fluorescent biosensors for selective detection of cellular Fe3+ in lysosomes: Thiophene as a selectivity-tuning handle for Fe3+ sensors

Iron-selective turn-on sensors are indispensable tools for understanding iron-related cell death processes and human diseases. In this study, we report a novel class of fluorescent sensors derived from an indolizino[3,2-c]quinoline scaffold that exhibit high selectivity for Fe3+ over other biologically abundant cations in cells, including Fe2+, Al3+, Zn2+, and Mn2+. IQ18 works as a ratiometric sensor with a Kd value of 7.1 × 10 −7 M and a detection limit of 5.2 nM in ethanol, whereas IQ44 displays fluorescence enhancement upon binding with Fe3+ in both ethanol and water. In aqueous solution, IQ44 exists as 150-nm nanoparticles. The suppressed fluorescent emission of IQ44 nanoparticles in water is switched on in response to Fe3+, working as a turn-on nanoparticle sensor. Structure-property relationship analysis with IQ derivatives revealed that the thiophene ring confers selectivity for Fe3+. By installing thiophene in IQ44 as a selectivity-tuning handle, fluorescence in the presence of Fe3+ resulting from restriction of intramolecular rotation (RIR) and increased torsion angle induced by iron demonstrated that IQ44 is specifically localized in lysosomes, where it recognizes cellular Fe3+ in live cells, as determined using confocal microscopy. In addition, the increased fluorescent puncta of IQ44 in the presence of Fe3+ colocalized well with the RFP-tagged LC3 proteins (pmRFP-LC3), enabling the detection of the autophagy process.

Spectrofluorometric Determination of Alpha Fetoprotein in different serum samples of Liver Cancer by Tb-acetyl acetone complex embedded in Polymethylmethacrylate optical sensor

A simple, precise and sensitive method in which, Tb-acetyl acetone (Tb-ACAC) complex embedded in polymethylmethacrylate (PMMA) is used for the early diagnosis of liver cancer. The diagnosis process depends on the assessment of the concentration of alpha fetoprotein (AFP) in the serum samples of different liver patients. The Tb-acetyl acetone (Tb-ACAC) embedded in PMMA has strong emission band at 545 nm after excitation at 350 nm in ethanol. The assessment of alpha fetoprotein (AFP) depends on the quenching of the emission band at 545 nm in ethanol by the alpha fetoprotein (AFP). The calibration plot was achieved over the concentration 1 - 550 ng/mL with a correlation coefficient of 0.99 and a detection limit of 0.5 ng/mL. The method was used satisfactorily for the diagnosis of liver cancer in a number of serum samples collected from various patients and health state; healthy (≤ 10 ng/mL) and HCC (400–550 ng/mL).

A fluorescent probe for hydrazine based on a newly developed 1-indanone-fused coumarin scaffold

A 7-diethylaminocoumarin and 1-indanone-fused fluorescent dye (CI) was developed. CI was superior to traditional coumarins in terms of bathochromic shift in absorption and emission maxima (λabs/λem = 518/598 nm in ethanol). To illustrate its value, we rational designed a new hydrazine-selective fluorescent probe by the judicious anchoring of CI to malononitrile to form CI-DCV. Upon mixing with hydrazine, the dicyanovinyl group of CI-DCV was converted to the corresponding hydrazone, which inhibited the intramolecular charge transfer within the probe, thereby affording remarkable blue shifts in the absorption and fluorescence spectra. The proposed probe shows high selectivity toward hydrazine over other structural analogs and reductive species and can be applied in hydrazine detection in a variety of samples.

Ortho-hydroxyl-oriented tandem-responsive diacylhydrazones with super sensitivity for Al3+ and subsequent potential recognition of Cu2+

Structure is a crucial factor to decide the selectivity and sensitivity of chemosensors. In this work, a diacylhydrazone 2a and its congeneric derivatives 2b-2d were synthesized and their applications for Al3+ detection were investigated. Except 2d, all the other compounds exhibit notable turn-on fluorescence toward Al3+ over 15 other metal ions and the sensitivities of 2b and 2c are even higher after modification, illustrating ortho-OH indispensability in their structures for sensing. Reversibility investigation shows that the sensors all have regeneration ability. Meanwhile, the sensor-Al3+ systems show selective fluorescence turn-off for Cu2+, providing a potential platform for tandem recognition of Al3+ and Cu2+. 2a as a standard, shows a 1:2 molar ratio to Al3+ confirmed by Job’s plot, 1H NMR spectra and mass spectra, and its detection limit for Al3+ is 7.63 nM in ethanol. It has relevant sensitivity over pH 3-9, with the highest sensitivity at around pH 4. Apart from Al3+ detection, anion selectivity was also explored and it shows that 2a, 2b and 2c all have selectivity toward CN− evidenced by UV-vis spectra.

A static headspace GC‐MS/MS method for the determination of ethanol, iso‐butanol, and n‐butanol at nanomolar concentrations in aqueous environmental samples

AbstractThe increased use of small molecular weight alcohols such as ethanol and potentially butanol isomers as biofuels has raised questions about the fate of these compounds in the environment once emitted. In order to address these questions, a method for the simultaneous determination of nanomolar concentrations of ethanol, n‐butanol, and iso‐butanol in aqueous environmental matrices is presented. The method consists of static headspace gas chromatograph‐mass spectrometer/mass spectrometer (GC‐MS/MS) analysis with detection limits of 28 nM for ethanol and 9 nM for each butanol isomer. Accuracy of the new method was verified by comparing ethanol concentrations in authentic environmental samples by an independent technique utilizing solid phase microextraction (SPME). Results of an intercomparison study between the static headspace GC‐MS/MS and SPME analyses produced a trend line with a slope of unity demonstrating that the methods produced statistically equivalent ethanol concentrations. Spiked additions of each alcohol in a variety of aqueous environmental matrices gave recoveries greater than 90% validating the accuracy of the headspace GC‐MS/MS analysis. The new static headspace GC‐MS/MS analysis represents the first methodology available with demonstrated accuracy in an array of environmental matrices with the requisite limit of detection capable of quantifying several alcohols in one analysis with minimal sample preparation and sample size requirement.

An OFF-ON-OFF type fluorescent probe based on a naphthalene derivative for Al3+ and F- ions and its biological application.

A novel fluorescent probe-based naphthalene Schiff, 1-(C2-glucosyl-ylimino-methyl)-naphthalene-2-ol (L) was synthesized by coupling d-glucosamine hydrochloride with 2-hydroxy-1-naphthaldehyde. It exhibited excellent selectivity and highly sensitivity for Al3+ in ethanol with a strong fluorescence response, while other common metal ions such as Pb2+ , Mg2+ , Cu2+ , Co2+ , Ni2+ , Cd2+ , Fe2+ , Mn2+ , Hg2+ , Li+ , Na+ , K+ , Fe3+ , Cr3+ , Zn2+ , Ag+ , Ba2+ and Ca2+ did not cause the same fluorescence response. The probe selectively bound Al3+ with a binding constant (Ka ) of 5.748×103 M-1 and a lowest detection limit (LOD) of 4.08nM. Moreover, the study found that the fluorescence of the L-Al3+ complex could be quenched after addition of F- in the same medium, while other anions, including Cl- , Br- , I- , NO2- , NO3- , ClO4- , CO32- , HCO3- , SO42- , HSO4- , CH3 COO- , PO43- , HPO42- , S2- and S2 O32- had nearly no influence on probe behaviour. Binding of the [L-Al3+ ] complex to a F- anion was established by different fluorescence titration studies, with a detection limit of 3.2nM in ethanol. The fluorescent probe was also successfully applied in the imaging detection of Al3+ and F- in living cells.

Self-assembled colloid and solvent-responsive property of amphiphilic fluoropolymer for protein-resistance coatings

Amphiphilic fluorocopolymer P (PEGMA)-co-P (DFHM) is prepared by hydrophobic dodecafluorohrptyl methacrylate (DFHM) and hydrophilic poly (ethylene glycol) methyl ether methacrylate (PEGMA) monomers via atom transfer radical polymerization (ATRP). The self-assembled colloids of P (PEGMA)-co-P (DFHM) in ethanol, dimethylformamide (DMF), tetrahydrofuran (THF), and chloroform (CHCl3) solutions are discussed according to solvent dielectric constants (e = 38.3–4.8). The hydrophilic/hydrophobic property, protein resistance, and adhesive strength of films formed by these colloids are evaluated based on the surface morphologies and chemical compositions. P (PEGMA)-co-P (DFHM) can self-assembly into core-shell micelles composed of P (PEGMA) shell and P (DFHM) core (~130 nm) as 500–600 nm in DMF, 300–400 nm in ethanol, and 200–250 nm in THF and CHCl3 solutions. These colloids provide the film surfaces with high fluorine content (39.40–41.70 wt%) to indicate the migration of fluorine-containing groups onto the film surface during the film formation and therefore the obvious hydrophilic/hydrophobic properties (94.3°–102.4° water contact angles and 58.5°–60.2° cetane contact angles). Comparatively, DMF-casted film gains the highest surface roughness (Ra = 0.98 nm), the lowest fluorine content (39.40 wt%), and the highest surface free energy (20.41 mN m−1) due to its large size of colloids, but CHCl3-casted film gives the lowest surface free energy (17.82 mN m−1). The adhesive strength for DMF- and ethanol-casted films (210 and 168 N) proves higher than THF- and CHCl3-casted films (105 and 63 N), while DMF-casted film shows much better protein resistance (Δf = −15.0 Hz) than other three films (Δf = −17–20 Hz). It is believed that the obtained P (P EGMA)-co-P(DFHM) could have a promising application as solvent-dependent and protein-resistance coatings.

Cryoemission of Nitrous Oxide and Ethanol: Dynamic and Energy Characteristics

We studied dynamic and spectral characteristics of light emission produced during cryodeposition of nitrous oxide and ethanol onto metal substrates at a temperature of 10 K and a pressure of a gas phase of \(10^{-2}\) Torr. It was established that this radiation is comprised of a large number of individual flashes of varying amplitude, wavelength and duration. Our measurements indicated that for nitrous oxide the rise time required to reach the maximum intensity of a single flash is \(0.015 \times 10^{-3}\) s, whereas for ethanol such time is \(0.3\times 10^{-3}\) s (i.e., 20 times greater). We attribute such discrepancy to the significant difference between the intrinsic molecular dipole moments of nitrous oxide \((\mu = 0.097\,D)\) and ethanol \((\mu = 1.68\,D)\). Emission spectra of both nitrous oxide and ethanol were measured in the wavelength range of 350–1050 nm. They consist of discrete peaks located at 517, 562, 690, 726, 805 and 866 nm for nitrous oxide and 387, 392, 822, 995 and 1019 nm for ethanol. To explain the obtained results, we consider two models based on the assumptions of existence of isomeric states of the nitrous oxide molecules, as well as of processes of molecular dipole ordering/disordering during cryodeposition from the gas phase.

Synthesis and characterization of M(II) (M = Cd, Hg and Pb) complexes with naphthodiaza-crown macrocyclic ligand and study of metal ion recognition by fluorescence, 1H NMR spectroscopy, and DFT calculation

To find metal ion recognition by L (L = O2N2-donor naphthodiaza-crown macrocyclic ligand), the complexes [ML]2+ (M = Cd, Hg and Pb) were synthesized and characterized by IR, 1H, 13C NMR, and mass spectrometry, as well as elemental microanalysis. Hg(II) showed perceptible enhancement of the fluorescence of L in which ultra-low limit of detection for Hg(II) by L was determined as 1 nM in ethanol and DMSO. L reserved selectivity of Hg(II) in its binary mixtures with metal cations in solution. A 1 : 1 stoichiometry was found for the interaction of Hg(II) with L while Benesi–Hildebrand method was applied to calculate its complexation binding constant (KBH) employing fluorescence spectrophotometry. The monitoring of the chemical shifts in 1H NMR spectra of these complexes demonstrated that the central macrocycle of L was tailored for the size of Hg(II). Density functional theory calculations using B3LYP/6–31G* basis set demonstrated that the macrocycle cavity of L was properly fitted for complex formation with Hg(II) cation, while both Cd(II) and Pb(II) cations did not form strong bonds with L from inadequate cation size. The present study shows detection method of Hg(II) and also possible application of naphthodiaza as an appropriate fluorophore macrocyclic ligand for detecting other metal ions.

Hydrophobic resorufamine derivatives: Potent and selective red fluorescent probes of the endoplasmic reticulum of mammalian cells

The endoplasmic reticulum (ER) of eukaryotic cells plays critical roles in the processing of secreted and transmembrane proteins. Defects in these functions are associated with a wide range of pathologies. To image this organelle, cells are often treated with fluorescent ER-Tracker dyes. Although these compounds are selective, existing red fluorescent probes of the ER are costly glibenclamide derivatives that inhibit ER-associated sulphonylurea receptors. To provide simpler and more cost-effective red fluorescent probes of the ER, we synthesized amino analogues of the fluorophore resorufin. By varying the polarity of linked substituents, we identified hexyl resorufamine (HRA) as a novel hydrophobic (cLogD (pH 7.4) = 3.8) red fluorescent (Ex. 565 nm; Em. 614 nm in ethanol) molecular probe. HRA is exceptionally bright in organic solvents (quantum yield = 0.70), it exclusively localizes to the ER of living HeLa cells as imaged by confocal microscopy, it is effective at concentrations as low as 100 nM, and it is non-toxic under these conditions. To examine its utility, we used HRA to facilitate visualization of small molecule-mediated release of a GFP-GPI fusion protein from the ER into the secretory pathway. HRA represents a potent, selective, and cost-effective probe for imaging and labeling the ER.

Crystal Structure of 3-Bromo-7-(dimethylamino)-4-methylcoumarin

Coumarin derivatives are a useful component for developing new materials, such as fluorescence materials and laser dyes; non-linear optical materials and reagents; photorefractive materials; photoresistors; intermediates for drug synthesis; luminescence materials; analytical reagents, etc.1,2 Coumarin 311, 7-(dimethylamino)-4-methylcoumarin, is also used as laser dyes. It gives laser emission at around 453 nm in ethanol. The crystal structure of coumarin 311 has already been reported.3 However the fluorence property and crystal structure of 3-bromo-7-(dimethylamino)-4-methylcoumarin (1) has not yet been reported. We now report on the crystal structure of 1 with the aim of the contributing to a deeper understanding of the substituent effect at the 3-position of coumarin 311 on the structure and crystal packing. Compound (1), shown in Fig. 1, was synthesized by the reaction of 7-(dimethylamino)-4-methylcoumarin with bromine in glacial acetic acid, as reported in a previous paper.4 The spectral data of 1 are as follows: mp 168 – 169 C, 1H NMR (CDCl3) d 2.53 (3H, s), 3.06 (6H, s), 6.48 (1H, d, J = 2.6 Hz), 6.62 (1H, dd, J = 9.0 Hz, 2.6 Hz), and 7.43 (1H, d, J = 9.0 Hz). 13C NMR (CDCl3) d 19.15, 40.1(2C), 97.7, 106.2, 109.3, 109.4, 125.8, 151.5, 152.8, 154.1, and 158.0. Compound (1) gave a strong emission band at 442 nm in chloroform solution (1.0 ¥ 10–5 M) when excited at 380 nm. Single crystals of 1 were grown in chloroform at room temperature. Data collection and refinement parameters are listed in Table 1. The H atoms were positioned with the idealized geometry, and were refined to be isotropic (Uiso(H) = 1.2Ueq(C)) using a riding model with C–H = 0.95 A for aromatic H atoms and C–H = 0.98 A for methyl H atoms. The selected bond distances and angles are collected in Table 2. An ORTEP drawing of the molecule of 1 is shown in Fig. 2. The molecule is almost planar with a maximum deviation of –0.154(2)A for N1. The dihedral angle between the pyrone ring Crystal Structure of 3-Bromo-7-(dimethylamino)-4-methylcoumarin

1-, 3-, 6-, and 8-Tetrasubstituted Asymmetric Pyrene Derivatives with Electron Donors and Acceptors: High Photostability and Regioisomer-Specific Photophysical Properties.

The systematic synthesis of five 1-, 3-, 6-, and 8-tetrasubstituted asymmetric pyrenes with electron donor and acceptor moieties is presented, together with an examination of their photophysical properties. Pyrene derivative PA1, containing one formyl and three piperidyl groups, showed bright solvatochromic fluorescence from green (λem = 557 nm, ΦFL = 0.94 in hexane) to red (λem = 648 nm, ΦFL = 0.50 in methanol), suggesting potential applications for PA1 as an environmentally responsive probe. Although the synthesis of simple 1- and 3-disubstituted pyrene derivatives is considered difficult, PA13, with two formyl groups at the 1- and 3-positions and two piperidyl groups at the 6- and 8-positions, could be synthesized successfully. PA13 exhibited less pronounced solvatochromism, but displayed a narrow fluorescent band with high ΦFL in all solvents (ΦFL > 0.75). Moreover, its absorption band displayed an exceptional bathochromic shift compared to the other derivatives (e.g., λabs = 480 and 522 nm in ethanol for PA1 and PA13, respectively), suggesting that such modifications of pyrene may be quite important for the modulation of its energy gap. Additionally, all compounds exhibited exceptionally high photostability, which highlights the advantage of these new dyes and provides new insights on the design of photostable fluorophores.

Fluorescence quenching N,N-bis(2,6-dimethylphenyl)-3,4:9,10-perylenetetracarboxylic diimide (BDPD) laser dye by colloidal silver nanoparticles.

The fluorescence quenching N,N-bis(2,6-dimethylphenyl)-3,4:9,10-perylenetetra-carboxylic diimide (BDPD) by colloidal silver nanoparticles (AgNPs) was studied in methanol and ethylene glycol by steady state fluorescence measurements. The Stern-Volmer quenching rate constant (Ksv) was calculated as 8.1 × 10(8) and 8.22 × 10(8) M(-1) in methanol and ethylene glycol respectively. Taking the fluorescence lifetime of BDPD in the absence of silver nanoparticles as 3.2 ns, the values of the fluorescence quenching rate constants (kq = Ksv/τ) are calculated as 2.54 × 10(17) and 2.56 × 10(17) M(-1) s(-1) in methanol and ethylene glycol respectively. From the data, fluorescence resonance energy transfer and / or electron transfer processes play a major role in the fluorescence quenching of BDPD by AgNPs in methanol and low concentrations of Ag NPs in ethylene glycol. The static quenching rate constant in ethylene glycol was calculated by modified Stern-Volmer equation as V = 8.86 × 10(9) M(-1). For dynamic quenching, the radius of quenching sphere volume r values were found to be 68.3 and 70.6 nm in ethanol and ethylene glycol, respectively. For static quenching in ethylene glycol the effective radius of quenching sphere action (kinetic radius) was calculated as r = 152 nm.

Study of laser ablated copper nanoparticles in different liquids and their effect on optical properties of Tb3+ in PVA

Cu nanoparticles have been prepared in different liquids i.e. aqueous solution of sodium dodecyl sulfate, acetone and ethanol with the help of laser ablation from a bulk copper target using 1,064 nm from Nd:YAG laser. Transmission electron microscopy and UV–vis spectrometry have been employed for the analysis of size and optical properties of the nanoparticles, respectively. X-ray diffraction patterns confirm the formation of Cu nanoparticles. The nanoparticles exhibit hexagonal nature with average particle size of 15–25 and 20–30 nm in case of sodium dodecyl sulfate and acetone respectively, whereas they posses spherical symmetry with bigger particle size of 30–40 nm in ethanol. The surface plasmon resonance peak shifts from 587 to 613 nm in different solvents, which is partly related to the change in shape and size of the particles. Further, Cu nanoparticles in different solvents have been added to polymer with terbium (Tb3+) ions to seek into the optical properties of the samples. The photoluminescence of Tb3+ ions varies with Cu nanoparticles in different solvents in polyvinyl alcohol and the result has been further verified by lifetime analysis.

Electron Donor-Acceptor Interaction of 8-Hydroxyquinoline with Citric Acid in Different Solvents: Spectroscopic Studies

Charge transfer complex formation between 8-hydroxyquinoline as the electron donor and citric acid as the electron acceptor has been studied spectrophotometrically in ethanol and methanol solvents at room temperature. Absorption band due to charge transfer complex formation was observed near 320 and 325 nm in ethanol and methanol, respectively. The stoichiometric ratio of the complex has been found 3 : 1 by using Job’s and conductometric titration methods. Benesi-Hildebrand equation has been applied to estimate the formation constant and molecular extinction coefficient. It was found that the value of formation constant was larger in ethanol than in methanol. The physical parameters, ionization potential, and standard free energy change of the formed complex were determined and evaluated in the ethanol and methanol solvents.