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Synthesis, Characterization and Antimicrobial activity Study Via some new Schiff bases for Trimethoprim

This search reports the synthesis of some new series of Schiff base compounds for trimetheprim derivatives which known high been known as a medicinal effectiveness. Trimetheprim was condensed with several substituted aldehydes compounds.(4-dimethyl amine benzaldehyde , propanal , salicaldehyde, 2.4 dimethoxy benzaldehyde and 4- methyl benzaldehyde) to obtain Schiff base products(1a-5a) and several substituted ketones compound (4-aminoacetophenone,4-chloroacetophenone, isobutyleketone, acetylacetone and acetophenone) to obtain Schiff base products(6b-10b) in ethanol in the presence of concentrated sulphuric acid as a catalyst to yield the Schiff base. The structure of synthesized compounds has been established on the basis of their Chemical structures of all products were confirmed by spectrophotometric methods such as U.V. visible and FTIR.. All these compounds were evaluated for their antibacterial activity in vitro against Gram + ve bacteria (bacillus) , Gram –ve bacteria (E-Coli).Most Compound under investigation exhibited potent antibacterial activity

Synthesis and Characterization of New Bases Derived from Nitrophenylpyrazoles, Coordination to Palladium and Antifungal Activity and Catalytic Activity in Mizoroki–Heck Reactions

In this study, we report the synthesis of eight Schiff bases (3–10) type N-heterocycle (N-het) using conventional refluxing conditions as well as different eco-friendly techniques such as grinding, thermal fusion, microwave irradiation (MWI) and ultrasound, all of them in the presence of a catalytic amount of acetic acid. These procedures had the additional advantage of being environmentally friendly and high-yield, making these protocols an alternative for Schiff-base syntheses. The obtained Schiff bases were coordinated to palladium, generating new complexes of type [Pd2Cl4(N-het)2]. Complexes [Pd2Cl4(5)2] and [Pd2Cl4(9)2] showed high activity and selectivity for a model Mizoroki–Heck C-C coupling reaction of styrene with iodobenzene and bromobenzaldehydes. All compounds and complexes were evaluated for antifungal activity against clinically important fungi such as Candida albicans and Cryptococcus neoformans. Although the Schiff bases (3–10) showed low antifungal activity against both fungi, some of their palladium complexes such as [Pd2Cl4(3)2], [Pd2Cl4(5)2], [Pd2Cl4(8)2] and [Pd2Cl4(10)2] showed comparatively higher antifungal effects mainly against C. neoformans. The product of the Mizoroki–Heck-type C-C coupling reactions, 4-styrylbenzaldehyde, was isolated and purified to be later used in the synthesis of four new nitrophenylpyrazole derivatives of styrylimine, which also displayed antifungal activity, especially against C. neoformans.

Synthesis of novel N-substituted benzyl N-(1,3-benzothiazol-2-yl) acetamides and their in vitro antibacterial activities

The novel Schiff bases 3a-3d were synthesized by reacting with 6- methyl-2-aminobenzothiazole and different substituted benzaldehydes. Afterwards, the obtained Schiff bases were reduced with NaBH4 to form amine compounds 4a-4d. In the final step, reaction of the amine with chloroacetyl chloride gave the novel amide derivatives 5a-5d. The structures of the all novel synthesized compounds were characterized by FT-IR, 1H NMR, 13C NMR, ESI MS, HETCOR, 2D (1H-1H) COSY and elemental analyses. To investigate the antimicrobial activities of the novel synthesized compounds, they were tested against some Gram-positive and Gram-negative bacterial and fungal species and the results were discussed.

Synthesis and Characterization of Tetradentate Schiff Base Ligand Containing 3,4-Diamino Benzophenone and Investigation of Complex Formation with Ni (II), Cu (II) and Co (II) metal ions

Compound that is a novel tetradentate Schiff base ligand [(3,4-bis(((E)-4-(diethylamino)-2-hydroxybenzylidene)amino)phenyl)(phenyl) methanone] (1), 4-(diethylamino) It was synthesized by the reaction of (3,4-diaminophenyl)(phenyl)methanone with -2-hydroxybenzaldehyde. Complex reactions with Co(II) (1a), Cu(II) (1b) and Ni(II) (1c) metals were prepared based on the obtained Schiff base ligand. The synthesized Schiff base and its Ni(II), Cu(II) and Co(II) complexes were featured using FT-IR, UV-vis, photoluminescence, mass and 1H and 13C-NMR spectroscopy. The characterization processes show that the tetradentate Schiff base compound coordinates with metal ions, oxygen of the hydroxyl group and nitrogen of the azomethine group.

Synthesis, spectral and thermal studies of new Schiff base copper(II) complexes with their biological effect on Entomopathogenic nematodes

AbstractNew Schiff base ligands; (Z)‐1,5‐diphenyl‐2‐((thiophen‐2‐ylmethylene)amino)‐1H‐pyrrole‐3‐carbonitrile (L1); or (Z)‐2‐((2,4‐dihydroxybenzylidene)amino)‐1,5‐diphenyl‐1H‐pyrrole‐3‐carbonitrile (H2L2) and their Cu(II) complexes have been isolated and characterized using elemental analysis, spectral (FT‐IR, 1H NMR, UV/vis, EPR), molar conductivity and magnetic moment measurements, in addition to thermal techniques. FT‐IR spectra established that the Schiff base L1 coordinates as neutral bidentate or tridentate ligand. While the Schiff base H2L2 ligates as neutral or monobasic bidentate ligand. The EPR spectra indicated covalent nature of complexes [CuL1(OH)]Cl.2H2O (1), [CuL1(OH)(H2O)2]NO3.2H2O (2), [Cu(H2L2)Cl(H2O)3]Cl.H2O (5) and [Cu(HL2)NO3(H2O)3].H2O (6). The biological effect of Cu(II) ions, current ligands and complexes (1, 5) on the mortality and rate of reproduction of Entomopathogenic nematodes (Heterorhabditis bacteriophora and Steinernema carpocapsae) was studied. The results showed that, the obtained Schiff base ligands and their Cu(II) complexes make detoxification of the lethal effect of Cu(II) ions on the beneficial Entomopathogenic nematodes and complex (1) scored the highest reproduction potential.

Transparent, hard-wearing and bio-based organic/silica hybrid coating for bamboo with enhanced flame retardant and antifungal properties

As an abundant natural resource, bamboo with enhanced flame retardancy and mildew resistance after surface treatment has a wider range of applications. Although several organic or metal oxide coatings have been used on bamboo, their basic properties such as transparency and durability are neglected, which limits their practical application. Herein, we prepared a new organic–inorganic coating by thermal curing between vanillin-derived epoxy (VEP) and hyperbranched siloxane (HPSi). The curing process of VEP/HPSi coating was analyzed with FTIR. When the mass ratio of VEP and HPSi was 20:28, the obtained Schiff base hybrid coating exhibited visible light transmittance over 90% and the highest pencil hardness of 9H. The mechanical properties of the coating were investigated by nanoindentation (hardness: 0.208 GPa, elastic modulus: 2.677 Gpa) and impact test. Impressively, the fabricated coating showed remarkable solvent wipe resistance (Xylene and ethanol: 1000 cycles) and continuous abrasion (cheesecloth test: 5000 cycles). In addition, the hydrophobic and dense coating endowed the coated bamboo excellent mildew resistance even in high humidity (97%). Due to the high thermal stability, the coated bamboo presented a significant enhanced flame resistance with a limiting oxygen index value of 29.1%. From a broader perspective, the Schiff base hybrid coating with excellent comprehensive performance and facile preparation process display great potential for practical application for bamboo or other substrates.

Synthesis and study of N, N` -(ethane-1,2-diyl)bis(1-phenyl methanimine) and thier complex derivative with in-vivo and in-vitro Bacteryal biological study

In this research, the synthesis and biological activity evaluation of N, N`-(ethane-1,2-diyl)bis(1-phenyl methanimine) as Schiff base with Zinc (II) dithiocarbamate complex are successfully reported. The suggested geometry around zinc ion centre was determined using selected unique physicochemical and spectroscopic techniques. These include melting point, conductance, FTIR, UV-Vis, mass spectroscopy and 1H-NMR spectroscopy. The analytical as well as the spectroscopic characterization data proves the formation of zinc complex with general formula [Zn(L)]2 and the complex of this ion is adopting tetrahedral geometry about the metal centre. Furthermore, the present study was carried out to evaluate antibacterial activity of obtained Schiff base ligand and Zn complex against five strains of bacteria (Staphylococcus aureus, Escherichia coli, Lacto bacillus, Klebsiella Pneumonae,and Salmonella typhi). The results of antimicrobial screening suggest that Schiff bases can show a considerable activity against Staphylococcus aureus, Escherichia coli, Klebsiella pneumonia and Salmonella typhi while Zn-complex was reported to be more active against all bacterial strains which is used in this test. The antibacterial activity of each compound has been examined practically (in vivo) by treating burns rats infected with tested bacteria (Staphylococcus aureus and Salmonella typhi), the results have shown signs of good recovery at short time if it compared with antibiotic Ofloxacin (OFX) used at the same time. And the number of bacteria was reduced significantly (P ≤ 0.001) during the treatment days. Furthermore, the results showed that Zn-complex is effective in treating various skin conditions; it is preferable to use it in the treatment of pathological injuries and against other skin infections.

Synthesis, structural studies and antioxidant activities of M(II) complexes with NOS donor schiff base ligand

Schiff base ligand, (E)-methyl 6-acetamido-2-(5-bromo-2-hydroxybenzylideneamino)-4,5,6,7- tetrahydrobenzo[b]thiophene-3-carboxylate, was successfully prepared with condensation reaction. The newly obtained Schiff base used to synthesize five new complex, [FeLCl(H2O)2]∙1.5H2O, [CoLCl(H2O)2]∙2H2O, [NiLCl(H2O)2]∙H2O, [RuLCl(p-cymene)]∙3.5H2O and [PdLCl∙H2O]∙ 3H2O. From the magnetic and spectral data, the geometric structures of these complexes were found to be square planar and octahedral. The characterizations of ligand and complexes were done by FT-IR, UV-Vis, 1H and 13C-NMR, microanalyses, magnetic susceptibility, mass spectra and thermogravimetry analysis (TGA) and further were screened for antioxidant activities. Antioxidant properties of synthesized compounds were examined using different methods including total antioxidant activity, FRAP (ferric reducing antioxidant power), CUPRAC (cupric reducing antioxidant capacity) and DPPH (2,2-diphenyl-1-picrylhydrazyl). The Ru(II), Pd(II), Fe(II) and Co(II) metal complexes generally exhibited good antioxidant properties.

Synthesis of Novel Amide Functionalized Pyrido[2,3-d]pyrimidine Derivatives and their Anticancer Activity

A series of novel amide functionalized pyrido[2,3-d]pyrimidine derivatives were synthesized from 2-amino-6-(thiophen-2-yl)-4-(trifluoro-methyl)nicotinonitrile (1), which on reaction with trifluoroacetic acid to get pyridopyrimidine (2). Compound 2 when treated with bromoethyl acetate followed by hydrazine hydrate to get hydrazide derivatives 4. Compound 4 on reaction with different substituted aromatic aldehydes to obtain Schiff base derivatives 5a-f. In another way, compound 3 treated with different substituted amines and amino acids to obtain amide derivatives 6a-f, 7a-d and 8a-c. All the compounds evaluated for anti-cancer activity against four human cancer cell lines such as A549-Lung cancer (CCL-185), MCF7-Breast cancer (HTB-22), DU145-prostate cancer (HTB-81) and HeLa-cervical cancer (CCL-2) and among the sythesized compounds, only 5d, 7d and 8a were identified as the potent compounds against the anticancer activity.

ANTIBIOTIC ACTIVITY OF NEW SPECIES OF SCHIFF BASE METAL COMPLEXES

Bacterial resistance is a growing challenge facing drug design scientists to find new medications or update commonly used antibiotics. The objective of this study was to synthesize, structure and highlight biological features of new species of metal-organic complexes [(MCl2))2)L1)] {M = Ni, Cu, L1) = N,N’-1,4- Phenylenebis(methanylylidene)bis(ethane-1,2-diamine)} and [(NiCl2))2)L2)]. The Schiff base ligands were prepared in an excellent yeilds by adding terephthalaldehyde to 1,2-ethane-diamine or 1,4-butane-diamine. Three binuclear Schiff base metal complexes were synthesized in a simple one-pot reaction by reacting the corresponding metal chloride (NiCl2) and CuCl2)) salts with the Schiff base ligands {L1) = N,N’-(1,4- phenylenebis(methanylylidene)bis(1,2-diethylamine)) and L2) = N,N’-(1,4- phenylenebis(methanylylidene)bis(butane-1,4-diamine))}. The obtained Schiff base metal complexes were analytically, characterized by a set of spectroscopic techniques such as FT-IR spectroscopy, 1H NMR spectra, and mass spectra. The structures characterization studies suggest that Schiff base ligands behave as N bidentate ligands for nickel and copper metal centers, which are known to act as Lewis acids. The biological activity of the Schiff base of nickel(II) and copper(II) complexes was tested by using the broth dilution method. The complexes showed antibacterial activity against all gram-negative and gram-positive bacteria (Enterobacter cloacae G-, Citrobacter G-, Pseudomonas G-, Klebsiella G-, Staphylococcus G+, and Streptococcus G+) that used in the trials. It is concluded that Schiff base metal complexes are a good candidate for the antibacterial drug because of its good activity against gram-negative and gram-positive strains demonstrated in the present study, as well as in other studies in the literature.

Schiff Bases and Triazolothiadiazines Derived from A Thiophene-Substituted 4-Amino-3-Mercapto-1,2,4-Triazole

Abstract 4-Amino-5-(thiophen-2-ylmethyl)-2,4-dihydro-3H-1,2,4-triazole-3-thione was synthesized and converted into the corresponding Schiff bases using several aromatic aldehydes. Reaction of this aminotriazolethione with phenacyl bromides lead to triazolothiadiazines, which were subsequently reduced with NaBH4 to dihydrotriazolothiadiazines. The latter type of fused heterocycle has been also obtained directly by reacting one of the previously obtained Schiff base with phenacyl bromides. NMR analysis confirmed the structures of the synthesized compounds.

SYNTHESIS, CHARACTERISATION, THERMAL ANALYSIS AND DNA CLEAVAGE ACTIVITY OF A NOVELZINC (II) COMPLEX OF PYRAZOLE SCHIFF BASES

A hydrazone Schiff base Zn(II) metal complex is synthesised from the Shiff base ligand Thiophene-2-carboxylic acid hydrazide and 1, 3-diphenyl-1H-pyrazole-4-carboxaldehyde reacted together in 1:1 mole ratio to obtain Schiff base ligand (HL) which was subsequently, allowed to react with Zn(CH3COO)2.2H2O. The Schiff base ligand and its Zn (II) complex prepared were characterized on the basis of elemental nalysis,thermogravimetry, UV-Visible spectroscopy, FT-IR spectroscopy and NMR spectroscopy. IR spectrum of the zinc complex shows that the ligand (HL) is coordinated to the metal ion in monoanionicbidentate fashion with the 1:2 metal to ligand stoichiometry. The thermal behaviour of thecomplex shows a single step decomposition pattern leaving the respective ZnO residue. The DNA cleavage activity of the complex ismonitored using agarose gel lectrophoresis method which indicates the potential of the complex to cleave supercoiled DNA.

Coordination behaviour and biological activity studies involving theoretical docking of bis‐Schiff base ligand and some of its transition metal complexes

The Schiff base ligand 1,2‐bis(2‐vinylphenoxy)ethane‐4,6‐diaminopyrimidine‐2‐thiol derived from the condensation of 4,6‐diaminopyrimidine‐2‐thiol with bisaldehyde was synthesized and characterized. Coordination compounds of this Schiff base with transition metal cations Cd(II), Zn(II), Ni(II), Co(II), Mn(II), Cu(II) and Fe(III) were synthesized and characterized. Microanalytical data, magnetic moments, mass, 1H NMR and infrared spectra, molar conductance measurements and thermal analyses were used to confirm the structures of the obtained Schiff base ligand and its chelates. According to the data obtained, the 1:1 general stoichiometric formulae of chelates are given by [M(HL)(H2O)2]Cl2 (M = Cd(II), Zn(II), Ni(II), Co(II), Mn(II), Cu(II)) and [Fe(HL)(H2O)2]Cl3. The diffuse reflectance spectra and magnetic moment measurements suggest an octahedral geometry for the complexes. The bis‐Schiff base ligand and metal ions are coordinated in a tetradentate manner via OO and NN donor sites as confirmed by infrared spectra. These complexes were then subjected to antibacterial studies using Gram‐positive (Streptococcus pyogenes and Bacillus subtilis) and Gram‐negative (Proteus vulgaris and Escherichia coli) organisms. The ligand and metal complexes exhibited pronounced antimicrobial activity against both types of bacteria. A docking study was conducted to evaluate the nature of the binding of the ligand and the most biologically active complexes to protein active sites of these bacteria.

RETRACTED: Cobalt Schiff base complexes: Synthesis characterization and catalytic application in Suzuki–Miyaura reaction

Abstract 3-Methoxysalicylaldehyde was condensed with the amines 4-aminoacetophenone and 2-amino-5-bromopyridine to obtain Schiff base ligands, 1 and 2, which were coordinated to cobalt salts as complex 1 and complex 2, respectively. The synthesized ligands and complexes were characterized by spectroscopic (FT-IR, UV–Vis, 1H-NMR and mass spectrometry), thermal (TGA) and elemental analysis. The structures of the complexes were verified by evaluating their magnetic susceptibility and spectroscopic evidences. Synthesized complexes were studied for their catalytic activity in the Suzuki–Miyaura cross-coupling of aryl halides with phenylboronic acid. Optimized reaction yields 90% of the cyanobiphenyl for complex 1 and 91% for complex 2 with 0.1 mmol of catalyst loading thereby substantiating the C C coupling efficiency of the synthesized complexes, 1 and 2.

The Synthesis and Characterization of s‐Triazine‐Cored Tripodal Structure and Its Salen/Salophen‐Bridged Fe/Cr(III) Capped Complexes

A novel Schiff base compound was synthesized, and its complexation properties with Fe(III) and Cr(III) were investigated. Tripodal ligand was synthesized by the reaction of s‐triazine and 4‐hydroxybenzaldehyde. Then a Schiff base involving 8‐hydroxyquinoline was synthesized by the reaction of 5‐aminomethyl‐8‐hydroxyquinoline (QN) and 2,4,6‐tris(p‐formylphenoxy)‐1,3,5‐triazine (TRIPOD) in methanol/chloroform media. The obtained Schiff base (QN-TRIPOD) was then reacted with four trinuclear Fe(III) and Cr(III) complexes including tetradentate Schiff bases N,N′‐bis(salicylidene)ethylenediamine (salenH2)/bis(salicylidene)‐o‐phenylenediamine (SalophenH2). The synthesized ligand and complexes were characterized by means of elemental analysis carrying out 1H NMR, FTIR spectroscopy, thermal analyses, and magnetic susceptibility measurements. Finally, metal ratios of the prepared complexes were determined by using atomic adsorption spectrometry.

Synthesis and characterization of azomethine polymers containing ether and ester groups

In this study, Schiff base was synthesized from the reaction of 4-carboxybenzaldehyde and 4-amino-3-methyl. Then, the obtained Schiff base was acted with aromatic and aliphatic dihalogen compounds in argon environment, and the polymers containing both ester and ether groups were obtained. For the structural analyses of synthesized substances FT-IR and NMR analysis, for the optical properties fluorescence and UV–Vis measurements, and for the thermal analyses TG-DTA and DSC techniques were used. In addition, electrochemical and electrical conductivity measurements were carried out. Aromatic imine polymers and their derivatives were already synthesized, and the properties such as high thermal resistance, low band gap and semi-conductive properties were also described in literature. In this study, new kinds of polymers synthesized are expected to have a high thermal resistance with elastic aliphatic and conjugated aromatic groups. The effects of the presence of etheric bonds and ester groups in the main chain of the polymers on several physical and thermal properties are also aimed to be explored.

Synthesis, characterization, and thermal decompositions of Schiff base polymers containing chitosan unit

The most plentiful natural biopolymer chitin and chitosan have become center of attraction of all party because of an unusual combination of biological activities, mechanical and physical properties. The several chemical modifications such as oligomerization, alkylation, quternization, enzymatic modifications, and graft copolymerization along with many assorted modifications have been carried out. However, its applications have only been shown in acidic medium because of its poor solubility in neutral and basic pH. In view of rapidly growing interest in chitosan its chemical aspects and chemical modification studies are reviewed. Four different aldehyde types, namely 4-hydroxybenzaldehyde (4HBA), 2-hydroxybenzaldehyde (2HBA), vanillin (VAN), 3-thiophenecarboxaldehyde (3TPCA), and their poly(4-hydroxybenzaldehyde) (P4HBA), poly(2-hydroxybenzaldehyde) (P2HBA), and poly (vanillin) (PVAN) were treated with chitosan to obtain Schiff base polymers. Although some of the chitosan-based Schiff bases were present in the literature, contrary to the literature the aldehydes (4HBA, VAN, 2HBA) were polymerized via oxidative polycondensation, followed by their reaction with chitosan to provide the Schiff base polymers, which were characterized by several techniques such as FTIR, TGA-DTA, DSC, SEM-EDX, and UV–Vis. Also, the solid-state electrical conductivities values of the compounds were measured by four-point probe technique.

Synthesis and Antitumor Evaluation of New Heterocycles Derived from 3-Methyl-2-benzothiazolinone Hydrazone

3-Methyl-2-benzothiazolinone hydrazone condensed with some selected aldehydes to give the corresponding Schiff bases. Cyclizing the obtained Schiff base derivatives with thioglycolic acid afforded the respective thiazolylideneaminothiazolidenones. Condensation of 3-methyl-2benzothiazolinone hydrazone with ethyl cyanoacetate yielded a mixture of the bishydrazine and the cyanoacetohydrazide derivatives. Meanwhile, its condensation with ethyl acetoacetate produced a mixture of the monoketone and the β-diketone derivatives. Besides, the reaction of the starting hydrazone with malononitrile afforded a mixture of the cyanomethylylidene and cyanomethyl hydrazone derivatives beside the bishydrazine derivative. Elementary and spectroscopic measurements were in good accord with the structures postulated for the new compounds. The antitumor activities of certain selected new compounds were screened, in vitro, against a panel of four (liver, HepG2; breast, MCF-7; lung, A549; and colon; HCT116) human solid tumor cell lines. The cells that showed better activity were HepG2 and MCF-7. Structure-activity relationship (SAR) was also discussed.

Environmentally safe conditions for synthesis of isobutyric acid

Isobutyric acid is used as the extractant of alkaline elements, in production of the preserving and desiccants. Perspective direction is the use of IBA is production of higher isomeric monocarboxylic acids based on it. Isobutyric acid is used limitedly of in organic synthesis due to its high cost. Isobutyric acid, as well as all lower monocarboxylic acids, mainly obtained by oxidizing the corresponding aldehyde. However, the known methods are characterized by low output of the target acid and not high change ratio of the aldehyde. To achieve high output of isobutyric acid without the accumulation of peracids the influence of the flow rate of the oxidizing gas, temperature, duration of oxidation on peracid content , output of isobutyric acid and change ratio of isobutyraldehyde are investigated in the present work. Researches have shown that in the presence of oxygen isobutyraldehyde reacts much faster - change ratio in one hour was 86 %, whereas in the oxidation by air - 60 %. However, the rate of peracid formation in oxygen oxidation is much higher and is equal to 4,3 % of post- mix weight. An environmentally safe conditions of liquid-phase oxidation of isobutyraldehyde to isobutyric acid are also investigated. Catalyst mixture, preventing the accumulation of hazardous peracids in the reaction mixture is developed. Best results are obtained by using selected catalytic system consisting of cobalt acetate, manganese acetate and cobalt bromide, in the ratio 1:0,5:0,1. In this case, the change ratio of IBA in one hour is 94 % and the content of peracid in the reaction mixture does not exceed 1,2 wt. %. A method of recovery of isobutyraldehyde from waste gases by chemisorption of polypropylene polyammine is proposed. The obtained Schiff base are proposed as an additive to corrosion inhibitors active base.

Syntheses and characterizations of multifunctional polyphenols derived from dihydroxyphenylene-based Schiff bases

Schiff base compounds were synthesized by condensation reaction of 1,4-diaminobenzene, naphthalene-1,5-diamine and 2,6-dichlorobenzene-1,4-diamine compounds with 2,4-dihydroxybenzaldehyde. The obtained Schiff bases were converted to their polyphenol derivatives by oxidative polycondensation. Sodium hypochlorite and air were used as the oxidants. Experimental parameters such as temperature, reaction time and oxidant concentration were varied to determine the optimum oxidative polycondensation conditions. The structures of all compounds were confirmed by FT-IR. UV-Vis and H-1- and C-13 NMR analyses. In addition, thermal properties of the Schiff bases and the corresponding polymers were determined by TG-DTA, DSC and DMA techniques. Photoluminescence properties of the synthesized compounds were determined in DMF solutions. Electrochemical characterizations were made by cyclic voltammetry measurements. Solid state conductivities of the polymers were determined by four point probe technique using an electrometer. The number average and weight average molecular weights and polydispersity index values of the synthesized compounds were determined by the size exclusion chromatography.