Investigation of synthesis and some properties of the copper complexes containing imidazole ligand

The copper(II) complexes bearing tetrasubstituted imidazole derivatives containing oxygen donor as ligands (L1-6) were synthesized and characterized by spectroscopic methods, magnetic measurements, elemental and thermogravimetric analyses. The fluorescence efficiency of the ligands (L1-6) and their copper(II) complexes were investigated at r.t. in DMF solution. Theoretical calculations were performed for the copper(II) complex of L4 ligand, in this study. The molecular geometry, bond lengths, bond angles and vibrational wave numbers were calculated by using ab initio calculations based on the Hartree-Fock{HF/6-31G(d)} and the density functional theory {B3LYP/6-31G(d)} in the ground state

Yeni bis-kaliks[4]aren bileşikleri ve metal komplekslerinin sentezi ve karakterizasyonu

Supramoleküllerin bir türü olan kaliksarenler, katyon, anyon ve organik moleküller için uygun birer reseptör olarak sentezlenebilen ve uygun şekilde dizayn edilebilen önemli bir bileşik sınıfıdır. Birden fazla kaliksareni bir araya getirerek çoklu kavite bölgeleri içeren ev sahibi moleküllere önemli bir örnek bis-kaliksaren türevleridir. Bağlandıkları bölgeye göre bis kaliksarenler üç farklı şekilde oluşturulabilir. Son 10 yılda anyonik ve katyonik misafir bileşikler için yeni ev sahibi moleküllerin dizaynı ve sentezi koordinasyon kimyasında oldukça önemli yer tutumaktadır. Bu çalışma iki bölümden oluşmaktadır. Birinci bölümde N,N-asetilhidrazit köprülü bis-kaliks[4]aren (5) ve hidrazit grupları içeren Schiff Bazı türevi tetrakis-kaliks[4]aren (8), ikinci bölümde elde edilen ligandların N2O2 üzerinden koordinasyonuyla metal kompleksleri sentezlendi. Elde edilen bileşiklerin yapıları spektroskopik yöntemlerle (UV-vis, FT-IR, 1H ve 13C-NMR, MALDİ-TOF-MS), DTA-TG ve elementel analiz teknikleriyle aydınlatıldı. Bis-kaliks[4]aren (5) ve bakır kompleksi (5a) bileşikleri için Gaussian programı kullanılarak kuantum mekaniksel hesaplamalarla en kararlı yapı belirlendi.Calixarenes are an important class of supramolecular molecules which have been constructed in the design and synthesis of artificial receptors for cations, anions and neutral organic molecules. Host moleculecules which have multicavity can synthesise by bringing together multiple calixarene regions. One of these is to create a derivative of bis-calixarenes. Bis-calixarenes can connect with three different ways depending on the region can be created. In the last decade design and synthesis of new hosts for anionic and cationic guests is a new and well documented field of coordination chemistry. This study consists of two parts. In the first part N,N-acethylhydrazide linked bis-calix[4]arene (5) and Schiff Base derivative tetrakis-calix[4]arene (8) were synthesised. In the second part complexes of the ligands were synthesised. The structures of ligands and theirs N2O2 coordinated metal complexes have been synthesized and characterized by UV-vis, FT-IR, 1H and 13C-NMR, MALDI-TOF-MS spectroscopic methods as well as DTA-TG and elemental analysis techniques. Most stable forms of the 5 and 5a was determined with Quantum Mechanical Calculatoions by Gaussian programe

Yenı bis-kaliks[4]aren bileşikleri ve metal komplekslerinin sentezi ve karakterizasyonu

Calixarenes are an important class of supramolecular molecules which have been constructed in the design and synthesis of artificial receptors for cations, anions and neutral organic molecules. Host moleculecules which have multicavity can synthesise by bringing together multiple calixarene regions. One of these is to create a derivative of bis-calixarenes. Bis-calixarenes can connect with three different ways depending on the region can be created. In the last decade design and synthesis of new hosts for anionic and cationic guests is a new and well documented field of coordination chemistry.This study consists of two parts. In the first part N,N-acethylhydrazide linked bis-calix[4]arene (5) and Schiff Base derivative tetrakis-calix[4]arene (8) were synthesised. In the second part complexes of the ligands were synthesised. The structures of ligands and theirs N2O2 coordinated metal complexes have been synthesized and characterized by UV-vis, FT-IR, 1H and 13C-NMR, MALDI-TOF-MS spectroscopic methods as well as DTA-TG and elemental analysis techniques. Most stable forms of the 5 and 5a was determined with Quantum Mechanical Calculatoions by Gaussian programe.Supramoleküllerin bir türü olan kaliksarenler, katyon, anyon ve organik moleküller için uygun birer reseptör olarak sentezlenebilen ve uygun şekilde dizayn edilebilen önemli bir bileşik sınıfıdır. Birden fazla kaliksareni bir araya getirerek çoklu kavite bölgeleri içeren ev sahibi moleküllere önemli bir örnek bis-kaliksaren türevleridir. Bağlandıkları bölgeye göre bis kaliksarenler üç farklı şekilde oluşturulabilir. Son 10 yılda anyonik ve katyonik misafir bileşikler için yeni ev sahibi moleküllerin dizaynı ve sentezi koordinasyon kimyasında oldukça önemli yer tutumaktadır..Bu çalışma iki bölümden oluşmaktadır. Birinci bölümde N,N-asetilhidrazit köprülü bis-kaliks[4]aren (5) ve hidrazit grupları içeren Schiff Bazı türevi tetrakis-kaliks[4]aren (8), ikinci bölümde elde edilen ligandların N2O2 üzerinden koordinasyonuyla metal kompleksleri sentezlendi. Elde edilen bileşiklerin yapıları spektroskopik yöntemlerle (UV-vis, FT-IR, 1H ve 13C-NMR, MALDİ-TOF-MS), DTA-TG ve elementel analiz teknikleriyle aydınlatıldı. Bis-kaliks[4]aren (5) ve bakır kompleksi (5a) bileşikleri için Gaussian programı kullanılarak kuantum mekaniksel hesaplamalarla en kararlı yapı belirlendi

Thermal and kinetic analyses of 2,5-bis(2-hydroxyphenyl)thiazolo[5,4-d]thiazole

Thermal behavior and UV-Vis absorption properties of 2,5-bis(2-hydroxyphenyl)thiazolo[5,4-d]thiazole were investigated in the present study. It was found that decomposition occurs in two stages which correspond to removal of both phenolic rings and degradation of remaining core structure, respectively. After the characterization of decomposition stages, apparent activation energy values of each stage were calculated using model-free isoconversional methods (FWO and KAS). Apparent activation energies of decomposition stages are determined by both methods. Their averages are calculated as 98.232 and 123.253 kJ mol -1 in consecutive order. UV-Vis absorption properties of this compound have been determined with using different solvents. © 2014 Akadémiai Kiadó, Budapest, Hungary

Thermal and kinetic analyses of 2,5-bis(2-hydroxyphenyl)thiazolo[5,4-d]thiazole

Thermal behavior and UV-Vis absorption properties of 2,5-bis(2-hydroxyphenyl)thiazolo[5,4-d]thiazole were investigated in the present study. It was found that decomposition occurs in two stages which correspond to removal of both phenolic rings and degradation of remaining core structure, respectively. After the characterization of decomposition stages, apparent activation energy values of each stage were calculated using model-free isoconversional methods (FWO and KAS). Apparent activation energies of decomposition stages are determined by both methods. Their averages are calculated as 98.232 and 123.253 kJ mol -1 in consecutive order. UV-Vis absorption properties of this compound have been determined with using different solvents. © 2014 Akadémiai Kiadó, Budapest, Hungary

High contrast electrochromic polymer and copolymer materials based on amide-substituted poly(dithienyl pyrrole)

Conducting polymers have attracted attention as active materials for low power consuming, flexible devices with vivid colors and simple, room temperature processing methods. However, the conductive polymers with high-contrast electrochromic properties are limited in the literature. Here we achieve high-contrast electrochromic switching by copolymerization of newly synthesized an amide substituted dithienyl pyrrole (PBA) and 3,4-ethylenedioxythiophene (EDOT). In order to obtain the best optical properties of copolymer, spectral characteristics of the synthesized copolymers with different monomer feed ratios were investigated. Both homopolymer and copolymer films exhibit well defined redox and satisfied coloration efficiency. Spectroelectrochemistry studies indicate that the P(PBA-co-EDOT) has a lower bandgap (1.67 eV) and shows the excellent optical contrast (77% of 1000 nm) and coloration efficiency (697.01 cm2 C-1). The copolymer method provides a novel way to fabricate a freestanding organic electrochromic device. Additionally, the fluorescence properties of both monomer and polymer were investigated. P(PBA) having strong emission and good solubility and also P(PBA) has the potential to be used in OLEDs. © 2016 The Electrochemical Society. All rights reserved

The synthesis and characterization of novel metalloporphyrazine containing crown ether linked calix[4]arene moieties

The synthesis and characterization of novel magnesium porphyrazine, peripherally symmetrically derived from 1,3-alternate 26,28-[35,36-dicyano-34,37-dithia-29,32,40,43-tetraoxa-35-en]calix[4]arene-crown-5, were carried out. This compound was prepared starting from cis-1,2-dicyano-1,2-ethylenedithiolate and 1,3-alternate 26,28-bis(5'-chloro-3'-oxapentyloxy)calix[4]arene-crown-5. The new macrocycle was characterized using the techniques of UV-vis, 1H, 13C NMR, IR, MS and elemental analysis. © 2009 Elsevier B.V. All rights reserved

A macrobicyclic substituted phthalocyanine

Abstract Not Availabl