Polymeric Schiff Base Research Articles

Nitrogen‐doped hierarchical few‐layered porous carbon for efficient electrochemical energy storage

AbstractLarge surface area, high conductivity, and rich active site of carbon electrode materials are necessary characteristics for energy storage devices. However, high conductivity and high nitrogen doping of carbon electrode materials are difficult to coordinate. Here, a facile method via the carbonization of nitrogen‐containing Schiff base polymer has been developed to prepare high conductivity and high nitrogen‐doped hierarchical porous carbon. The organic components with a benzene ring structure in the polymer promote the formation of more sp2‐graphitized carbon, which is beneficial for the improvement of electrical conductivity. Nitrogen‐doped hierarchical porous carbon calcined at 900°C under the NH3 atmosphere possesses high nitrogen content of 7.48 at%, a large specific surface area of 1613.2 m2/g, and high electrical conductivity of 2.7 S/cm. As electrode materials in an aqueous‐based supercapacitor, nitrogen‐doped hierarchical porous carbon exhibits superior specific capacitance of 385 F/g at 1 A/g as well as excellent rate performance (242 and 215 F/g at a current density of 100 and 200 A/g, respectively). In addition, the specific capacitance of electrode measured in a two‐electrode system is 335 F/g at 1 A/g, and the long‐term cycling stability can be achieved with more than 94% initial capacitance after 10 000 cycles. The constructed symmetric supercapacitor delivers high energy density and high power density. The outstanding electrochemical performances combined with the novel and scalable synthetic approach make the nitrogen‐doped hierarchical porous carbon potential electrode material for electrochemical devices.

Schiff Base polymers: synthesis and characterization

The reaction between a carbonyl group (aldehyde or ketone) with amine in suitable condition, the Schiff base compounds with an amine group with the general structure R1R2C=NR3 (R3 ≠ H) was prepared [1, 2]. These compounds were first prepared by German scientist Hugo Schiff. The Schiff base compounds are widely used as a ligand in the coordination chemistry [3, 4]. The division of these compounds is diverse and depending on the various parameters, they are divided into symmetric, asymmetrical, anionic, neutral types and etc. But in most cases the division of these compounds is based on the number of atoms that are coordinated to the center ion. Accordingly, they are divided into mono-, bi- and multi-dentate ligands. Important groups of these compounds are chelated bi-and tetra-dentate ligands, which can be obtained from the reaction of salicylic aldehyde and amine derivatives [5, 6]. The simplicity of providing, having different colors, stabilizing metal complexes and diverse applications has led many research groups to work on these compounds [1, 2, 5, 6]. The most important properties of these compounds are anion sensor [6–8] and avoid steel corrosion [9, 10]. In recent years the innovation of novel Schiff base polymers as thermally stable polymers play a vital role in many areas, among that the most important factor of thermally stable polymers for different industry. Because of that, these advances are interested in improvement of heat and thermal stability and safety. Day to day in this globalization, thermal stable polymers requires a long shelf life, along with monitoring the safety and quality based upon international standards. In this chapter it inculcates, thermally stable polymers such as PA, PI and PES and its stability, long life, mechanical and thermal properties for different applications.

Multi-Functional Cardanol Triazine Schiff Base Polyimine Additives for Self-Healing and Super-Hydrophobic Epoxy of Steel Coating

The designing of multifunctional materials in system-level efficiency is one of the main targets and a hot topic for the application of novel green or bio-based materials and structures. In this work, the chemical structure of bio-based cardanol that was derived from cashew oil was modified through a reaction with a bishydrazino-s-triazine derivative followed by condensation polymerization or reaction with terephthaldehyde to obtain a Schiff base polymer. The chemical structures of the modified cardanol-bishydrazino-s-triazine-based monomer and the Schiff base polymer were confirmed from FTIR and NMR spectroscopy analyses. The modified cardanol bishydrazino-s-triazine monomer and polymer were added with different weight ratios during the curing of the epoxy/polyamine hardener to improve the thermal, mechanical, and anti-corrosion characteristics of the epoxy coating of a steel substrate. The data elucidated that the presence of a cardanol bishydrazino-s-triazine monomer and polymer improves the thermal, mechanical, adhesion, and anti-corrosion characteristics of epoxy coatings after exposure for more than 1500 h. The presence of a cardanol- bishydrazino-s-triazine polymer more than 3 wt.% during the curing of epoxy networks produces superhydrophobic and self-healing epoxy coatings. The modification of the epoxy coating with the cardanol bishydrazino-s-triazine polymer improves the seawater contact angle by more than 150° and the adhesion strength of the epoxy coating with the steel surface.

Removal of Co2+, Cu2+ and Au3+ ions from contaminated wastewater by using new fluorescent and antibacterial polymer as sorbent

New Schiff base polymer was synthesized through polycondensation reaction of dialdehyde (2,2′-hexamethylenebis(oxybenzaldehyde)) and diamine (dapsone). The resulting polymer was characterized through CHN analysis, 1HNMR, FT-IR, UV–Vis spectroscopy, fluorescence spectroscopy, TG/DTA and SEM. The synthesized polymer was fluorescent and showed violet color emission. The antimicrobial activity of the polymer was tested, and the polymer showed moderate antibacterial activity against Shigella flexneri. New effective method was developed for the removal of Co2+, Cu2+ and Au3+ ions from contaminated wastewater, and the synthesized polymer was employed as sorbent. Multivariate optimization of parameters (pH, concentration, amount and time) was attained through factorial design (face-centered Draper–Lin composite design) with 18 batch experiments. The method was applied successfully at predicted optimum conditions for the removal of heavy metal ions (Co2+, Cu2+ and Au3+) from contaminated wastewater samples. The synthesized sorbent polymer removed up to 78% Co2+, 99% Cu2+ and 98% Au3+ from wastewater samples. The concentration of metal ions before and after adsorption was measured through AAS. The presence of metal ions on the polymer surface was confirmed through SEM and EDX analysis of the polymer after adsorption. Equilibrium of the adsorption process was studied through Langmuir, Freundlich and D–R isotherms, and kinetics was studied through Lagergren pseudo-first-order, Lagergren pseudo-second-order and intra-particle diffusion models. Graphical representation of the procedure employed for the removal of Co2+, Cu2+ and Au3+ ions from wastewater systems by using newly synthesized polymer (PoHOBD) as sorbent at optimized conditions.

Catalytic reduction of 4‐nitrophenol by means of nanostructured polymeric Schiff base complexes

Polymeric Schiff base ligands were synthesized using 2‐hydroxybenzaldehyde (L2), 4‐hydroxy‐3‐methoxybenzaldehyde (L4), and 5‐aminoisophthalic acid. The nanostructured complexes were then synthesized using Ni2+, Cu2+, and Mn3+. The ligands and complexes thus synthesized were characterized using Fourier‐transform infrared spectroscopy, X‐ray diffraction, thermogravimetric analysis (TGA), and field‐emission scanning electron microscopy. The thermal stability of the complexes was confirmed using TGA. The synthesized complexes were used as catalysts in the reduction of 4‐nitrophenol (4‐NP) to 4‐aminophenol in an aqueous phase in the presence of sodium borohydride. In this work, the catalytic reactivity of nanostructured complexes was compared using the rate constant (k) of the reaction. The reaction time for the reduction of 4‐NP was 5–14 min for different complexes. The catalytic system based on Ni2+/2‐hydroxybenzaldehyde was the most active and displayed reusability in the reduction of 4‐NP.

Synthesis and antioxidant activities of phenolic Schiff base monomers and polymers

In this work, synthesis, characterization, and antioxidant activities of two Schiff base monomers (1 and 2) and their corresponding oxidation products (3 and 4) were reported. The monomers were prepared by condensation of 8-amino-2-naphthol with 2,4-dihydroxybenzaldehyde and 3,4-dihydroxybenzaldehyde, and then, they were oxidized to in alkaline medium by NaOCl to obtain the corresponding oxidation products. The compounds 1–4 were characterized by various spectral techniques. The analysis results indicated that the oxidation products had a chain structure consisting of randomly ordered phenylene and oxyphenylene units. In vitro antioxidant activities of 1–4 were evaluated against a ABTS cation radical and a DPPH free radical and compared with standard natural antioxidants, vitamin C (ascorbic acid), and vitamin E (α-tocopherol). The ferric reducing antioxidant power and ferrous-ion chelating activities of 1–4 were also determined.

Facile Synthesis of Polymeric Schiff Base Metal Complex as Electrode for High-performance Supercapacitors

This research presents a simple method for preparing poly Schiff base ligand (L) and its metal complex (M–L, M = Al3+, Cr3+, Zn2+) as electrode materials for supercapacitors, which is derived from mixing terephthalaldehyde, m-phenylenediamine and metal nitrate in ethanol at room temperature. Compared with L, M–L combine the advantages of larger surface area, appropriate mesopore diameter, unique morphology and suitable conductivity. The electrochemical properties of the materials are assessed by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) analysis in 6 M KOH electrolyte. The results show that the electrochemical performance of M–L significantly improve compared with L, especially when the current density is 0.5 A g−1, Al–L displays a superior specific capacitance of 608.6 F g−1. Moreover, the specific capacitance of Al–L still reaches 299.1 F g−1 after 1000 GCD cycles at 10 A g−1, which is higher than the initial capacitance of Cr–L and Zn–L. Moreover, the electrochemical resistance of Al–L is smaller than that of others. Therefore, Al–L will become an attractive material in supercapacitors, and opens the door for further research on various poly Schiff base metal complexes (poly[M(Schiff)]) as electrode materials for supercapacitors.

Synthesis, characterization, thermal stability and kinetics of thermal degradation of novel polymers based-s-triazine Schiff base

The present work represents the synthesis of five new s-triazine based Schiff base polymers via condensation polymerization process between bishydrazino-s-triazine derivatives and terephtaldehyde. The prepared polymers were characterized by different techniques (FTIR, UV-Vis, TGA, XRD and DSC). The new polymers showed good thermal properties and good values for the Limited Oxygen Indexed (LOI) 22.74, 27.36, 30.52, 24.38, 21.39 for polymers 5a-e; TP-DHBT, TP-DHMBT, TP-DHMT, TP-DHPT, and TP-DHMeT, respectively. Accordingly, these types of polymers could be classified as flame-retardant and self-extinguishing polymers. The Tg values of the polymers 5a-e varied in the range from 191.4 to 241.1. The effect of substituent in the triazine ring has great impact on the properties of the polymers 5a-e as observed from the DSC and XRD results. Moreover, the thermal degradation kinetics of two selected polymers with higher thermal stability (5b and 5c) from the prepared series was studied using the method of Friedman. The behavior of activation energy is found to be highly dependent on the polymer molecular structure.

Biomass Schiff base polymer-derived N-doped porous carbon embedded with CoO nanodots for adsorption and catalytic degradation of chlorophenol by peroxymonosulfate

The development of highly active and multifunctional carbocatalysts modified with heteroatoms or metal species is crucial for practical environmental remediation applications. In this study, nitrogen-doped porous carbon embedded with highly dispersed CoO nanodots (CoO-N-C) was successfully prepared from a biomass-derived Schiff base polymer for the first time. The morphology analysis shows that CoO nanodots were embedded in the N doped carbon layer with size of ∼6.5 nm. CoO-N-C catalyst exhibited excellent 4-CP adsorption efficiency as well as excellent catalytic performance in the activation of peroxymonosulfate (PMS) for 4-CP degradation. Total organic carbon (TOC) removal was close to 99.7% and involved a combination of adsorption and degradation processes. Singlet oxygen (1O2) was found to be the dominant oxidative species for 4-CP degradation. The underlying mechanism of these processes were elucidated, and it was found that the introduction of CoO nanodots in CoO-N-C not only enhanced radical catalytic processes, but also significantly enhanced the non-radical catalytic processes of PMS activation. This derived from the synergistic effect between the embedded CoO nanodots and doped nitrogen for the increase of electron density on carbon surface of catalyst, thereby accelerating the electron transfer process for PMS activation and improving the catalytic performance.

Nitrogen/oxygen co-doped porous carbons derived from a facilely-synthesized Schiff-base polymer for high-performance supercapacitor

Abstract We report an effective strategy for the preparation of nitrogen/oxygen co-doped porous carbons (DQPACs) based on a facile, low-cost, high-yield polymerization between 2,5-dihydroxy-1,4-benzoquinone and p-phenylenediamine in acetic acid solvent without any catalyst, and then subjected to carbonization and KOH activation at 600–800 °C. The resultant DQPAC-700 exhibits abundant micropores, large specific surface area (1659.97 m2 g–1), and a high level of nitrogen/oxygen doping contents (as high as 4.09 wt.% and 10.84 wt.%, respectively). Therefore, the DQPAC-700 is a promising electrode material for supercapacitors, delivering the maximum specific capacitance of 292 F g–1 at 0.5 A g–1 and a good rate capacitance of 167 F g–1 at 50 A g–1 in 6 M KOH electrolytes. The optimized supercapacitor displays a high cycling stability (capacitance retention up to 96% after 20,000 cycles at 5 A g–1) and a moderate energy density (11.3 Wh kg–1 at 103 W kg–1). When using 1 M Na2SO4 solution as the electrolyte, the energy density can be further improved to 25.6 Wh kg–1. The results indicate that our polymerization approach is facile and effective, which can be extended to develop other nitrogen-rich polymers for the creation of more porous carbon materials with abundant nitrogen/oxygen species.

Feasibility of toxic metal removal from aqueous medium using Schiff-base based highly porous nanocomposite: Adsorption characteristics and post characterization

Fabrication of novel adsorbent with high surface area and high adsorption capacity is in urgent demand for water treatment, Therefore, in this study, a nanocomposite include Schiff base polymer and magnetic Fe3O4 nanoparticles was synthesized and characterized using analytical techniques including FTIR, TGA, XRD, Raman, SEM, TEM, XPS and N2 adsorption-desorption studies. The fabricated magnetic porous organic polymer (MPOP) was used as an efficient adsorbent for the removal of Cd(II) and Hg(II) from aqueous solution. The adsorption kinetic results revealed that both metal ions; Cd(II) and Hg(II) supported the pseudo-second-order adsorption kinetic model. The Langmuir isotherm model supported the adsorption over MPOP with a maximum adsorption capacity of 308.9 mg g−1 and 284.6 mg g−1 for Cd(II) and Hg(II), respectively. The thermodynamic results indicated that the adsorption of both metal ions was spontaneous and endothermic. The regeneration results suggested that the novel MPOP was a promising reusable adsorbent for the adsorption of heavy metal ions from aqueous solution.

Design of new Schiff base polymers containing thiadiazole rings and study of their liquid crystalline behavior

New liquid crystalline thiadiazole dibenzaldehyde monomers labeled as THDB1–THDB3 were successfully synthesized by alkylation of thiadiazole’s potassium salt with 4-(bromomethyl) benzaldehyde. A number of polymers consisting of thiadiazole and azomethine coded PTDAZ1–PTDAZ5 were synthesized via condensation reaction of the presynthesized monomers THDB1–THDB3 with aromatic diamines. The chemical structures of the prepared materials were confirmed using Fourier-transform infrared spectroscopy and proton nuclear magnetic resonance techniques. The liquid crystalline behavior of the studied monomers and polymers was examined by differential scanning calorimetry and hot stage polarized optical microscopy (POM) techniques. All these compounds were found to demonstrate mesomorphic transitions belonging to smectic and nematic liquid crystals. The studied monomers exhibited fan-like texture of smectic mesophase under POM cooling investigation. Fan-like texture of smectic and nematic mesophases was observed under POM for PTDAZ1 and PTDAZ2, while PTDAZ3 and PTDAZ4 revealed clay and schlieren textures of the smectic and nematic mesophases, respectively, and nematic texture has been found for the polymer PTDAZ5.

Ionic metallo‐Schiff base polymers of VO2+, Zn2+ and Cu2+: Synthesis, characterization and solid‐state conductivity

The viologen‐type dialdehyde of [N,N′‐bis(methylsalicylaldehyde)‐4,4′‐bipyridinium] dichloride (DA) was synthesized by reacting 5‐chloromethylsalicylaldehyde and 4,4′‐bipyridine. Then a new polymeric Schiff base ligand (PSBL) was synthesized by the condensation reaction of ethylenediamine and DA in methanol under reflux conditions. Afterwards, new ionic metallo‐Schiff base polymers (IMSPs) were synthesized by reacting PSBL with VO(acac)2, ZnCl2 and CuCl2 via coordination chelation. DA, PSBL and IMSPs were characterized using various analytical methods and spectral techniques. The solid‐state electrical conductivities of PSBL and IMSPs were studied. The electrical conductivity of these polymers at 300 K ranged from 1.30 × 10−5 to 4.52 × 10−10 Ω−1 m−1, which means they are potential organic and metallo‐organic semiconductors.

Preparation of two novel Schiff base polymers and their Eu (III)/Yb (III) complexes

A series of novel Schiff base photosensitive polymers with coordination property were synthesized through a condensation reaction. Then using the Schiff base photosensitive polymers as macromolecular ligands, a series of polymer rare-earth complexes were prepared through a coordination reaction. The structure of the polymer and their corresponding complex was performed by means of Fourier transform infrared and ultraviolet spectroscopy; the fluorescence properties of the complex were mainly investigated by fluorescence spectroscopy, and the thermal property was investigated by differential scanning calorimetry and thermogravimetric analysis. The luminescence properties of the europium (Eu) (III)/ytterbium (Yb) (III) complex in dimethylformamide solutions were investigated. The experimental results show that the complexes have fine thermal stability and all the europium (III)/ytterbium (III) complexes exhibit characteristic photoluminescence peaks in the visible region and the results indicate that the complexes are promising in the field of light-emitting materials and can be further mixed with a suitable polymer to form functional rare-earth polymers.

Ratiometric fluorescence detection of O2•− based on dual-emission schiff base polymer/rhodamine-B nanocomposites

A novel ratiometric fluorescent sensor for superoxide radical (O2•−) detection was developed based on Schiff base polymer (SBP)/rhodamine-B (SBP/RDB) nanocomposites. The SBP/RDB was investigated by atomic force microscopy, scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, Fourier transform infrared spectroscopy, N2 adsorption/desorption isotherms and fluorescence spectroscopy, etc. The results showed the SBP was two-dimensional (2D) crystalline nanosheet with the thickness of 0.5 nm. RDB could be self-assembled on each of 2D SBP surface to form SBP/RDB due to the hydrogen bond between N atoms of SBP and –COOH of RDB as well as π-π interaction. The SBP/RDB exhibited the characteristic fluorescence emission of both SBP at 485 nm and RDB at 585 nm under an excitation of 270 nm. The 2D SBP was not only acted as template to assemble RDB, but also used as reference fluorescence for O2•− detection. The SBP/RDB fluorescence probe for O2•− detection demonstrated high sensitivity and selectivity with good linear range (11.1 ± 0.76 nM–8.0 ± 0.36 μM) and low detection limit (3.7 ± 0.42 nM). Because of the low cost and simple operation, the work sheds some new light to construct ratiometric fluorescent sensors based on SBP to detect O2•− in drinking water and human blood serum for commercial applications.

Ratiometric electrochemical glucose sensor based on electroactive Schiff base polymers

In this work, a flexible electroactive Schiff base polymers (SBPThi) was prepared by p-benzaldehyde-thionine amine-aldehyde condensation reaction and applied for electrochemical sensing for the first time. The SBPThi was demonstrated to be two-dimensional crystal nanosheet with a thickness of 0.8 nm. N2 adsorption/desorption isotherms illustrated that SBPThi was mesoporous material. The porous SBPThi could be used to load glucose oxidase (GOD) and be assembled on electrode surface firmly. The electrochemical behaviors of SBPThi were studied and the results indicated that SBPThi had two pairs of redox peaks at -0.05 V and -0.2 V. They were far away from the oxygen reduction peak and accordingly could be used as reference signal to construct ratiometric glucose electrochemical sensor based on SBPThi/GOD. The proposed ratiometric electrochemical glucose sensor showed linear range from 1.97 μM-4.0 mM with detection limit of 0.66 μM when the peak at -0.2 V was used as reference signal and linear range from 0.82 μM-4.0 mM with detection limit of 0.27 μM when the peak at -0.05 V was used as reference signal. The SBPThi could also be made into flexible electrode to determine glucose in sweat. The results indicated that SBPThi could be used for electrochemical sensors.

Synthesis, Characterization, Antimicrobial Activity and Theoretical Studies of New Polymeric Schiff-base

A novel Schiff-base compound was synthesized by condensation of 4-hydroxybenzaldehyde and 4-aminoazobenzene. The prepared Schiff-base was converted to a polymer by reaction with formaldehyde and resorcinol. The two types of the prepared compounds were characterized with spectral techniques (FT-IR and 1H-NMR). The biological activity as antibacterial and antifungal was tested using the cork well diffusion method against some standard microorganisms, which indicate that these compounds showed good antimicrobial activity. HyperChem-8 program has been used to determine total energy, LUMO-HOMO, bond length and angles.

Synthesis, characterization, and in vitro and in vivo 68Ga radiolabeling of thiosemicarbazone Schiff base derived from dialdehyde dextran as a promising blood pool imaging agent

To be used as a carrier of 68Ga radioisotope for possible blood pool imaging studies, dialdehyde dextran thiosemicarbazone (DADTSC) Schiff base polymer with different thiosemicarbazone contents (TSCC) = 0.93, 2.43, and 3.4 mmol/g were synthesized and characterized by FT-IR, GPC, and CHNS. Although they were successfully radiolabeled at room temperature, stable radio-complexes were prepared at 60 °C. Effect of thiosemicarbazone content on the dissolution rate, cytotoxicity, coagulation and hemolysis activities, and radiolabeling efficiency of Schiff bases as well as on the in-vitro radio-complexes stability was investigated. DADTSC1 (TSCC = 0.93 mmol/g) showed a less cytotoxicity (cell viability, CV50 = 490 μg/ml), a better solubility, suitable coagulation and hemolytic activities, and a sufficient radiolabeling efficiency (Radiochemical purity (RCP) > 95%) and formed a stable (RCP > 90%) radio-complex, which be chosen for in-vivo biodistribution study in healthy rats through tissue sampling and counting for radioactivity. Like blood pool imaging agents, 68Ga-DADTSC1 presented a retention profile in blood circulation, though more studies, including imaging in larger mammals, are required.

Porous Triazine Containing Covalent Organic Polymer Supported Pd Nanoparticles: A Stable and Efficient Heterogeneous Catalyst for Sonogashira Cross‐Coupling and the Reduction of Nitroarenes

AbstractHere, we report the synthesis and characterization of palladium nanoparticles immobilized on (Pd@DASs) triazine containing covalent organic polymer prepared through solvothermal method to the formation of Schiff base polymer condensation reaction between 1,4‐diaminobenzene and 4,4′,4′′‐(1,3,5‐triazine‐2,4,6‐triyl)tribenzaldehyde, respectively. The synthesized Pd@DASs was thoroughly characterized by various techniques including FT‐IR, UV‐DRS, EDAX, powder XRD, scanning electron microscopy (SEM) and X‐ray photoelectron spectroscopy. Furthermore, the prepared Pd@DASs potential catalytic performance was evaluated for Sonogashira cross‐coupling of various aryl halides with phenylacetylene, K2CO3 as a base in water/DMF (2:1) solvent for about 3 h and the same catalyst was used for reduction of nitroarenes using hydrazine hydrate (Hydrogen source) in methanol/water (1:2) mixture of solvent for about 1.30 h under mild reaction conditions. Neither copper and nor ligand and additives are required in the reaction medium, which exhibits high catalytic activity and excellent to good yield (upto 96% and 99%), the catalyst can be separated easily and recycle for several times.

Synthesis and characterization of fluorescent polyphenols anchored Schiff bases via oxidative polycondensation

Abstract A series of polyimines, bearing phenolic groups were successfully synthesized in aqueous alkaline solution via chemical oxidative polycondensation. Polymeric Schiff bases were synthesized by condensation of 2,4-dihydroxybenzaldehyde and 3-hydroxy-4-metoxybenzaldehyde with 2-aminophenol and 3-aminophenol. The molecular structures of the synthesized Schiff bases and their corresponding polymers were studied by FT-IR, UV-Vis, 1H-NMR and 13C-NMR spectroscopic methods. Thermal stability of the imine polymers was evidenced by their initial degradation temperatures found in the range of 170 °C to 271 °C without any sign of melting. The results of UV-Vis and cyclic voltammetry (CV) measurements were coherent with the optical Eg and the electrochemical E′g band gaps of the polyimines which were lower than those of their corresponding Schiff bases. Fluorescence spectral analysis of P4 (Schiff base polymer P4 derived from 3-aminophenol and 3-hydroxy-4-methoxybenzaldehyde) revealed a bicolor emission with blue and green light. Electrical conductivity of the synthesized imine polymers was measured by four-point probe technique. P4 showed the highest electrical conductivity as a result of iodine vapor contact time. Morphology characterization of the synthesized polyimines was carried out using a scanning electron microscope SEM at different magnifications. The study revealed that P4 is a promising candidate for both blue and green light emitters which could be used in the production of photovoltaic materials and solar cells.