Synthesis, Characterization and Photophysical Properties of Metallopolyynes and Metallodiynes of Platinum(II) with Dibenzothiophene Derivatives
Synthesis, Characterization and Photophysical Properties of Metallopolyynes and Metallodiynes of Platinum(II) with Dibenzothiophene Derivatives
复制标题
DOI：
10.1007/s10904-012-9761-1
复制
发表时间：
2012
影响因子：
4
通讯作者：
Cheuk‐Lam Ho;Suk‐Yue Poon;P. Lo;M. Wong;W. Wong
中科院分区：
文献类型：
--
作者：
Cheuk‐Lam Ho;Suk‐Yue Poon;P. Lo;M. Wong;W. Wong
以CuI为催化剂，通过反式-[PtCl_2（PBu_3）_2]和HC_CRCH的脱卤化氢偶联反应，合成了可溶、热稳定、易加工的反式-[-Pt（PBu_3）_2C_CRCH_我们报道了它们的光吸收和光致发光光谱，并与单体模型络合物[Pt（Ph）（PEt 3）2C]-[CRC]-[CPt（Ph）（PEt 3）2]的结果进行了比较。中心R基团的不同电子性质和键合几何结构导致了具有不同物理性质的新型金属有机材料。含共轭基团较多的3，7-二取代二苯并噻吩-S，S-二氧化物的聚合物主要显示荧光带，而含共轭基团较少的2，8-二取代间隔基的异构体有效地提高了体系间的交叉速率，即使在室温下也能检测到较强的磷光发射。
Soluble, thermally stable, and easily processable platinum(II) polyyne polymers of the formtrans-[–Pt(PBu3)2C≡CRC≡C–]n(R = 2,8-disubstituted dibenzothiophene, 2,8-disubstituted and 3,7-disubstituted dibenzothiophene-S,S-dioxide units) have been prepared in good yields by CuI-catalyzed polymerization involving the dehydrohalogenating coupling oftrans-[PtCl2(PBu3)2] and HC≡CRC≡CH. We report their optical absorption and photoluminescence spectra and compare the results with the monomeric model complexestrans-[Pt(Ph)(PEt3)2C≡CRC≡CPt(Ph)(PEt3)2]. The different electronic properties and linkage geometry of the central R group lead to new organometallic materials with distinct photophysical traits. The polymer with more conjugated 3,7-disubstituted dibenzothiophene-S,S-dioxide mainly displays fluorescence band, while its isomer with less conjugated 2,8-disubstituted spacer effectively enhances the intersystem crossing rate and strong phosphorescence emission can be detected even at room temperature.