Synthesis,Optical Properties,and Photoluminescence of Organometallic Acetylide Polymers of Platinum Functionalized with Si and Ge-Bridged Bis(3,6-Diethynyl-9-butylcarbazole) |
| |
Authors: | Wai-Yeung Wong Suk-Yue Poon Jian-Xin Shi Kok-Wai Cheah |
| |
Affiliation: | (1) Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, PR China;(2) Department of Physics and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, PR China |
| |
Abstract: | A series of light-emitting group 14 element-containing organometallic platinum polyynes of the form trans-–Pt(PBu3)2C≡ CArC≡ C(ER2)C≡ CArC≡ C–]
n
(Ar = 9-butylcarbazole-3,6-diyl, ER2 = SiMe2, SiPh2, GeMe2, GePh2) were synthesized and spectroscopically characterized. The solution properties and regiochemical structures of this new structural
class of organosilicon- and organogermanium-based metallopolyynes were studied by IR and NMR (1H, 13C, 29Si, and 31P) spectroscopies. The optical absorption and photoluminescence spectra of these metallopolymers were examined and compared
with their well-defined dinuclear model complexes trans-Pt(Ph)(PEt3)2C≡ CArC≡ C(ER2)C≡ CArC≡ CPt(Ph)(PEt3)2]. The influence of the heavy platinum atom and the group 14 silyl or germyl structural unit possessing different side group
substituents on the thermal and phosphorescence properties were investigated in detail. We have also established the goal
for studying the evolution of the lowest singlet and triplet excited states with the nature of ER2 unit in these metallopolymers. The present work indicates that the phosphorescence emission efficiency harnessed through
the heavy-atom effect of platinum in the main chain changes significantly with the identity of ER2 in the general orders GeR2 > SiR2 (R = Me, Ph) and EMe2 > EPh2 (E = Si, Ge).
Dedicated to Professor Ian Manners in recognition of his outstanding contribution to inorganic and organometallic polymers. |
| |
Keywords: | Alkyne carbazole germanium phosphorescence platinum polyyne silicon |
本文献已被 SpringerLink 等数据库收录! |
|