TY - JOUR
T1 - End-capped silole dendrimers on a carbosilane periphery
T2 - Potential electroluminescent materials
AU - Son, Ho Jin
AU - Han, Won Sik
AU - Kim, Hyojeong
AU - Kim, Chungkyun
AU - Ko, Jaejung
AU - Lee, Chongmok
AU - Kang, Sang Ook
PY - 2006/1/30
Y1 - 2006/1/30
N2 - The divergent synthesis of end-capped silole dendrimers Gn-2 n+1Silole (n = 1-4) using 2,4,6,8tetramethyl-2,4,6,8- tetravinylcyclotetrasiloxane [Me(CH2=CH)SiO]4 as a core molecule and allyl alcohol/ dichloromethylsilane as a building block is described in this paper. The reaction of the dichloride functionalities of the carbosiloxane dendrimers Gn-2n+2Cl (n = 1-4) with the 1,4-diphenylbutadiene1,4-dianions (1) provided an effective route for the attachment of silole functionalities to a dendritic periphery. In addition, dendritic siloles GBn-2nSilole (n = 1-3) based on phenylethynylmethylsilane (PhC=C)2Me2Si as cores were synthesized. The building blocks of the dendrimers consisted of double bonds (-PhC=CHMeSi-) in the inner shell and silole groups on the outermost periphery. The generational limit of the dendrimer for the two-branching type core molecule was found to have eight silole groups for the third generation. All of the dendrimers were characterized by 1H and 13C{1H} NMR, UV spectroscopy, cyclic votammetry (CV), and size exclusion chromatography (SEC). Using this methodology, a series of silole-containing dendrimer systems showing green to greenish-blue fluorescence were synthesized.
AB - The divergent synthesis of end-capped silole dendrimers Gn-2 n+1Silole (n = 1-4) using 2,4,6,8tetramethyl-2,4,6,8- tetravinylcyclotetrasiloxane [Me(CH2=CH)SiO]4 as a core molecule and allyl alcohol/ dichloromethylsilane as a building block is described in this paper. The reaction of the dichloride functionalities of the carbosiloxane dendrimers Gn-2n+2Cl (n = 1-4) with the 1,4-diphenylbutadiene1,4-dianions (1) provided an effective route for the attachment of silole functionalities to a dendritic periphery. In addition, dendritic siloles GBn-2nSilole (n = 1-3) based on phenylethynylmethylsilane (PhC=C)2Me2Si as cores were synthesized. The building blocks of the dendrimers consisted of double bonds (-PhC=CHMeSi-) in the inner shell and silole groups on the outermost periphery. The generational limit of the dendrimer for the two-branching type core molecule was found to have eight silole groups for the third generation. All of the dendrimers were characterized by 1H and 13C{1H} NMR, UV spectroscopy, cyclic votammetry (CV), and size exclusion chromatography (SEC). Using this methodology, a series of silole-containing dendrimer systems showing green to greenish-blue fluorescence were synthesized.
UR - http://www.scopus.com/inward/record.url?scp=33644534806&partnerID=8YFLogxK
U2 - 10.1021/om050991v
DO - 10.1021/om050991v
M3 - Article
AN - SCOPUS:33644534806
SN - 0276-7333
VL - 25
SP - 766
EP - 774
JO - Organometallics
JF - Organometallics
IS - 3
ER -