کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1326035 977415 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, characterization, and spectrophotometric studies of novel fluorescent arachno decaborane and nonaborane clusters containing aza-distyrylbenzene derivatives
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Synthesis, characterization, and spectrophotometric studies of novel fluorescent arachno decaborane and nonaborane clusters containing aza-distyrylbenzene derivatives
چکیده انگلیسی

Two aza-analogues of distyrylbenzene namely: 1,4-bis[β-(4-quinolyl)vinyl]benzene (PhQ) and 1,4-bis[β-(4-pyridyl)vinyl]benzene (PhPy) containing arachno-decaborane or arachno-nonaborane clusters have been isolated: 6,9-(PhQ)2-arachno-B10H12 (1), N,N′-bis[9-Me2S-arachno-B10H12-6-yl]PhQ (2), 6,9-(PhPy)2-arachno-B10H12 (3), N,N′-bis[(9-Me2S)-arachno-B10H12-6-yl]PhPy (4), N,N′-bis[arachno-B9H13-4-yl]PhQ (5), 4-PhQ-arachno-B9H13 (6), N,N′-bis[arachno-B9H13-4-yl]PhPy (7), and 4-PhPy-arachno-B9H13 (8). These boronated compounds were easily prepared from the displacement reactions of weaker ligand (SMe2) of bis (dimethyl sulfide) arachno-decaborane(14) {6,9-(Me)2SB10H12}or dimethyl sulfide-arachno-nonaborane {4-(Me)2SB9H13} by the stronger bidentate ligands of PhQ or PhPy in ratio (1:2). The electronic interaction between decaborane or nonaborane arachno-type unit and the bonded pyridine units has been investigated by UV–Vis spectroscopy and by AM1 molecular orbital calculations. The resulting compounds undergo trans–cis photoisomerization upon excitation. The connection of boron clusters to PhQ and PhPy led to enhancing of the photoreactivity and decreasing of the fluorescence quantum yield of the products.

Distyrylbenzene analogues containing arachno-borane clusters have been synthesized. The resulting compounds undergo trans–cis photoisomerization upon excitation.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 693, Issue 6, 15 March 2008, Pages 1065–1072
نویسندگان
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