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Alessio Dessi - One of the best experts on this subject based on the ideXlab platform.
photoactive compounds based on the thiazolo 5 4 d Thiazole core and their application in organic and hybrid photovoltaicsEuropean Journal of Organic Chemistry, 2016Co-Authors: Gianna Reginato, Alessandro Mordini, Lorenzo Zani, Massimo Calamante, Alessio DessiAbstract:
Thiazolo[5,4-d]Thiazoles (TzTzs) are fused bicyclic heteroaromatic compounds characterized by a rigid planar backbone and an extended π-conjugated electronic structure. Although they have been known for many decades, interest in their properties and applications has begun to increase only recently, after their incorporation into a series of active materials used in the field of organic electronics. Recently, the thiazolo[5,4-d]Thiazole scaffold has been inserted into new photoactive compounds (both small-molecule compounds and polymers) used to build bulk-heterojunction organic solar cells (OSCs), as well as in new organic π dyes for dye-sensitized solar cells (DSSCs). This microreview focuses on the preparation of such TzTz-containing materials and their application in the field of organic and hybrid photovoltaics.
Michael G Walter - One of the best experts on this subject based on the ideXlab platform.
thiazoloThiazole fluorophores exhibiting strong fluorescence and viologen like reversible electrochromismJournal of the American Chemical Society, 2017Co-Authors: Alexis N Woodward, Justin M Kolesar, Sara R Hall, Nemahallah Saleh, Daniel S Jones, Michael G WalterAbstract:
The synthesis, electrochemical, and photophysical characterization of N,N′-dialkylated and N,N′-dibenzylated dipyridinium thiazolo[5,4-d]Thiazole derivatives are reported. The thiazoloThiazole viologens exhibit strong blue fluorescence with high quantum yields between 0.8–0.96. The dioctyl, dimethyl, and dibenzyl derivatives also show distinctive and reversible yellow to dark blue electrochromism at low reduction potentials. The fused bicyclic thiazolo[5,4-d]Thiazole heterocycle allows the alkylated pyridinium groups to remain planar, strongly affecting their electrochemical properties. The singlet quantum yield is greatly enhanced with quaternarization of the peripheral 4-pyridyl groups (ΦF increases from 0.22 to 0.96) while long-lived fluorescence lifetimes were observed between 1.8–2.4 ns. The thiazoloThiazole viologens have been characterized using cyclic voltammetry, UV–visible absorbance and fluorescence spectroscopy, spectroelectrochemistry, and time-resolved photoluminescence. The electrochromic p...
Uwe Beifuss - One of the best experts on this subject based on the ideXlab platform.
transition metal free synthesis of imidazo 2 1 b Thiazoles and thiazolo 3 2 a benzimidazoles via an s propargylation 5 exo dig cyclization isomerization sequence using propargyl tosylates as substratesJournal of Organic Chemistry, 2014Co-Authors: Mohamed A Omar, Wolfgang Frey, Juergen Conrad, Uwe BeifussAbstract:
A transition-metal-free route for the synthesis of several N-fused heterocycles, including thiazolo[3,2-a]benzimidazoles and imidazo[2,1-b]Thiazoles, is reported. The reaction between propargyl tosylates and 2-mercaptobenzimidazoles under basic conditions results in 3-substituted thiazolo[3,2-a]benzimidazoles, in yields up to 92% in a single synthesis step. With 2-mercaptoimidazoles as the substrate, the corresponding imidazo[2,1-b]Thiazoles were exclusively obtained. The transformation is considered to proceed as an intermolecular S-propargylation that is followed by 5-exo-dig ring closure and double-bond isomerization.
Samereh Seyfi - One of the best experts on this subject based on the ideXlab platform.
Diastereoselective synthesis of fused [1,3]thiazolo[1,3]oxazins and [1,3]oxazino[2,3-b][1,3]benzoThiazolesMolecular Diversity, 2009Co-Authors: Issa Yavari, Zinatossadat Hossaini, Sanaz Souri, Samereh SeyfiAbstract:
An efficient diastereoselective synthesis of 7-ethyl 5,6-dialkyl 7 H -[1,3]thiazolo[2,3- b ][1,3]oxazin-5,6, 7-tricarboxylates and 2-ethyl 3,4-dialkyl 2 H -[1,3]oxazino [2,3- b ][1,3]benzoThiazole-2,3,4-tricarboxylates via reaction of Thiazole and benzoThiazole with dialkyl acetylenedicarboxylates in the presence of ethyl pyruvate is described.
Omer Kucukbasmaci - One of the best experts on this subject based on the ideXlab platform.
synthesis and antimicrobial activity evaluation of new 1 2 4 triazoles and 1 3 4 thiadiazoles bearing imidazo 2 1 b Thiazole moietyEuropean Journal of Medicinal Chemistry, 2010Co-Authors: Nuray Ulusoy Guzeldemirci, Omer KucukbasmaciAbstract:
Abstract A series of 4-alkyl/aryl-2,4-dihydro-5-((6-(4-bromophenyl)imidazo[2,1- b ]thiazol-3-yl)methyl)-3 H -1,2,4-triazole-3-thiones ( 3a – i ) and 2-alkyl/arylamino-5-((6-(4-bromophenyl)imidazo[2,1- b ]thiazol-3-yl)methyl)-1,3,4-thiadiazoles ( 4a – c ) were synthesized starting from 6-(4-bromophenyl)imidazo[2,1- b ]Thiazole-3-acetic acid hydrazide. The newly synthesized compounds were characterized by IR, 1 H NMR, mass and elemental analysis. All compounds were tested for antibacterial and antifungal activities. The antimicrobial activities of the compounds were assessed by the microbroth dilution technique. The compounds were also evaluated for antituberculosis activity against Mycobacterium tuberculosis H 37 Rv (ATCC 27294). The preliminary results revealed that some of the compounds exhibited promising antimicrobial activities.