Enhanced Dual Visible Light Fluorescence from the 2,2'-Dipyridyl Tungsten Alkylidyne Complex [W(CC6H4NMe2<
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- 作者：Paul A. Jelliss ; Keith M. Wampler ; and Aleksander Siemiarczuk
- 刊名：Organometallics
- 出版年：2005
- 出版时间：February 14, 2005
- 年：2005
- 卷：24
- 期：4
- 页码：707 - 714
- 全文大小：193K
- 年卷期：v.24,no.4(February 14, 2005)
- ISSN：1520-6041
文摘
The N,N-dimethylanilino tungsten alkylidyne complex [W(
CC6H4NMe2-4)(O2CCF3)(CO)2(NC5H4Me-4)2] has been synthesized, characterized, and employed as a precursor to neutraland cationic 2,2'-dipyridyl and TMEDA (N,N,N',N'-tetramethylethylenediamine) complexes,which display dual blue and yellow fluorescences in CH2Cl2 solutions at ambient temperatures with surprisingly high quantum yields for this class of organometallic complex. Theefficiencies of the radiative emissions from the 2,2'-dipyridyl complex [W(CC6H4NMe2-4)(O2CCF3)(CO)2{
2-2,2'-(NC5H4)2}] are particularly impressive. The dual nature of theemissions (
em 
450 and 540-580 nm) is attributed to independent, short-lived (ns) "twistedintramolecular charge transfer" (1TICT) and 1dW-
*WCAr states, respectively, the formerbeing well understood in organic aromatic systems, but yet to be described for organometalliccomplexes.
CC6H4NMe2-4)(O2CCF3)(CO)2(NC5H4Me-4)2] has been synthesized, characterized, and employed as a precursor to neutraland cationic 2,2'-dipyridyl and TMEDA (N,N,N',N'-tetramethylethylenediamine) complexes,which display dual blue and yellow fluorescences in CH2Cl2 solutions at ambient temperatures with surprisingly high quantum yields for this class of organometallic complex. Theefficiencies of the radiative emissions from the 2,2'-dipyridyl complex [W(CC6H4NMe2-4)(O2CCF3)(CO)2{2-2,2'-(NC5H4)2}] are particularly impressive. The dual nature of theemissions (em 450 and 540-580 nm) is attributed to independent, short-lived (ns) "twistedintramolecular charge transfer" (1TICT) and 1dW-*WCAr states, respectively, the formerbeing well understood in organic aromatic systems, but yet to be described for organometalliccomplexes.