linkages had great effect on their self-assembly and photophycial properties. Both ether and amide compounds were mesogens, while the ester compounds were non-mesogens. The ether compounds displayed Colhex/p6mm phases, while the amide compound displayed two kinds of columnar phases i.e. columnar rectangular phase with p2mm and columnar hexagonal phase with p6mm lattices depending on temperature. The column
三个系列的4,7-二苯基-2,1,3-苯并噻二唑(DBTD)基聚类,其中包含与3,4,5-三烷氧基苯单元相连的中心4,7-二苯基-2,1,3-苯并噻二唑部分关键步骤是通过Suzuki偶联反应合成通过醚(-OCH 2-),酯(-OOC-)或酰胺(-HNCO-)连接的两端。连接的极性对它们的自组装和光物理性质有很大的影响。醚和酰胺化合物都是介晶,而酯化合物是非介晶。醚类化合物显示Col hex / p 6 mm相,而酰胺类化合物显示两种柱状相,即p的柱状矩形相。2 mm的柱状六方相,具有p 6 mm的晶格,具体取决于温度。柱相可以在电场中或在机械剪切下对齐。醚和酰胺化合物显示出明显的红移最大吸收和发射。在固态和凝胶态下,醚和酰胺化合物均为黄色发光,而酯化合物均为绿色发光。
Photophysical and electrochemical properties of π-extended molecular 2,1,3-benzothiadiazoles
作者:Brenno A. DaSilveira Neto、Aline Sant'Ana Lopes、Gunter Ebeling、Reinaldo S. Gonçalves、Valentim E.U. Costa、Frank H. Quina、Jairton Dupont
DOI:10.1016/j.tet.2005.08.093
日期:2005.11
adequate band gap values for testing as OLEDs. The 4,7-disubstituted-2,1,3-benzothiadiazoles 4a–e and 7a–e exhibit different electrochemical behavior. The presence of two ethynyl spacers in 2,1,3-benzothiadiazoles 7a–e shifts the reduction potentials to less cathodic values and also results in two well-defined and distinct reduction processes.
Are Molecular 5,8-π-Extended Quinoxaline Derivatives Good Chromophores for Photoluminescence Applications?
作者:Fabiana S. Mancilha、Brenno A. DaSilveira Neto、Aline S. Lopes、Paulo F. Moreira、Frank H. Quina、Reinaldo S. Gonçalves、Jaïrton Dupont
DOI:10.1002/ejoc.200600376
日期:2006.11
The synthesis of a new series of photoluminescent compounds, namely 5,8-diaryl quinoxaline derivatives (aryl = phenyl, 4-fluorophenyl, 4-methoxyphenyl, and 4-cyanophenyl), was achieved by a direct Suzuki cross-coupling reaction with the employment of a NCP-pincer palladacycle. The electrochemical and photophysical properties of these compounds were also investigated. Four new 4,8-diaryl-2,1,3-benzothiadiazoles
Between Aromatic and Quinoid Structure: A Symmetrical UV to Vis/NIR Benzothiadiazole Redox Switch
作者:Philipp Rietsch、Sebastian Sobottka、Katrin Hoffmann、Alexey A. Popov、Pascal Hildebrandt、Biprajit Sarkar、Ute Resch‐Genger、Siegfried Eigler
DOI:10.1002/chem.202004009
日期:2020.12.23
Reversibly switching the light absorption of organic molecules by redox processes is of interest for applications in sensors, light harvesting, smart materials, and medical diagnostics. This work presents a symmetricalbenzothiadiazole (BTD) derivative with a high fluorescence quantum yield in solution and in the crystalline state and shows by spectroelectrochemical analysis that reversible switching of UV
Visible Light‐Mediated Conversion of Alcohols to Bromides by a Benzothiadiazole‐Containing Organic Photocatalyst
作者:Run Li、Dominik W. Gehrig、Charusheela Ramanan、Paul W. M. Blom、Fabien F. Kohl、Manfred Wagner、Katharina Landfester、Kai A. I. Zhang
DOI:10.1002/adsc.201900416
日期:2019.8.21
with the designed organic photocatalyst under visiblelight irradiation with high efficiency and selectivity. The catalytic efficiency of the novel benzothiadiazole‐based photocatalyst is comparable with the state‐of‐art metal and non‐metal catalysts. Furthermore, advanced photophysical studies including time‐resolved photoluminescence and transient absorption spectroscopy offer a powerful support for