Covalent Rigid-Rod Organometallic Polymers with Alternating Transition Metal Clusters and Conjugated Spacers in the Main Chain
详细信息 查看全文
- 作者：Piero Leoni ; Lorella Marchetti ; Swagat Kumar Mohapatra ; Giacomo Ruggeri ; Lucia Ricci
- 刊名：Organometallics
- 出版年：2006
- 出版时间：August 14, 2006
- 年：2006
- 卷：25
- 期：17
- 页码：4226 - 4230
- 全文大小：94K
- 年卷期：v.25,no.17(August 14, 2006)
- ISSN：1520-6041
文摘
The first rigid-rod cluster-containing 
-alkynyl polymers E-[({Pt6}-CC-Ar-CC)]x-{Pt6}-E [(3), {Pt6}= Pt6(
-PBut2)4(CO)4, E = end group; Mn = 22 000-38 000] have been prepared by step-growthpolycondensation of {Pt6}Cl2 and 1,4-didodecyl-2,5-diethynylbenzene (HCC-Ar-CCH) under Sonogashira-type conditions. The monodisperse oligomers HCC-Ar-CC-({Pt6}CC-Ar-CC)x-{Pt6}-CC-Ar-CCH [(4) x = 0; (11) x = 2; (15) x = 4] were also prepared by stepwise procedures, still based onCu(I)-catalyzed dehydrohalogenation reactions. A red-shift of the UV-vis absorption centered at ca.470 nm, on increasing chain length, suggests some degree of electron delocalization along the backbone.
-alkynyl polymers E-[({Pt6}-CC-Ar-CC)]x-{Pt6}-E [(3), {Pt6}= Pt6(-PBut2)4(CO)4, E = end group; Mn = 22 000-38 000] have been prepared by step-growthpolycondensation of {Pt6}Cl2 and 1,4-didodecyl-2,5-diethynylbenzene (HCC-Ar-CCH) under Sonogashira-type conditions. The monodisperse oligomers HCC-Ar-CC-({Pt6}CC-Ar-CC)x-{Pt6}-CC-Ar-CCH [(4) x = 0; (11) x = 2; (15) x = 4] were also prepared by stepwise procedures, still based onCu(I)-catalyzed dehydrohalogenation reactions. A red-shift of the UV-vis absorption centered at ca.470 nm, on increasing chain length, suggests some degree of electron delocalization along the backbone.