TY - JOUR
T1 - Synthesis, spectroscopy, structures and photophysics of metal alkynyl complexes and polymers containing functionalized carbazole spacers
AU - Liu, Li
AU - Wong, Wai Yeung
AU - Shi, Jian Xin
AU - Cheah, Kok Wai
AU - Lee, Tik Ho
AU - Leung, Louis M.
N1 - Funding Information:
Financial support from a CERG Grant from the Hong Kong Research Grants Council of the Hong Kong SAR, P.R. China (Project No. HKBU2022/03P) and Hong Kong Baptist University is gratefully acknowledged.
PY - 2006/9/19
Y1 - 2006/9/19
N2 - A new class of soluble and thermally stable group 10 platinum(II) poly-yne polymers functionalized with 9-arylcarbazole moiety trans-[-Pt(PBu3)2C{triple bond, long}CRC{triple bond, long}C-]n (R = 9-arylcarbazole-3,6-diyl; aryl = p-methoxyphenyl, p-chlorophenyl) were prepared in good yields by the polycondensation polymerization of trans-[PtCl2(PBu3)2] with HC{triple bond, long}CRC{triple bond, long}CH under ambient conditions. The optical absorption and emission properties of these polymetallaynes were investigated and compared with their bimetallic molecular model complexes trans-[Pt(Ph)(PEt3)2C{triple bond, long}CRC{triple bond, long}CPt(Ph)(PEt3)2] as well as their group 11 gold(I) and group 12 mercury(II) neighbors [(PPh3)AuC{triple bond, long}CRC{triple bond, long}CAu(PPh3)] and [MeHgC{triple bond, long}CRC{triple bond, long}CHgMe]. The structures of all the compounds were confirmed by spectroscopic methods and by X-ray crystallography for selected model complexes. The influence of the heavy metal atom and the 9-aryl substituent of carbazole on the evolution of lowest electronic singlet and triplet excited states is critically characterized. It was shown that the organic-localized phosphorescence emission can be triggered readily by the heavy-atom effect of group 10-12 transition metals (viz., Pt, Au, and Hg) with the emission efficiency generally in the order Pt > Au > Hg. These carbazole-based organometallic materials possess high-energy triplet states of 2.68 eV or higher which do not vary much with the substituent of 9-aryl group.
AB - A new class of soluble and thermally stable group 10 platinum(II) poly-yne polymers functionalized with 9-arylcarbazole moiety trans-[-Pt(PBu3)2C{triple bond, long}CRC{triple bond, long}C-]n (R = 9-arylcarbazole-3,6-diyl; aryl = p-methoxyphenyl, p-chlorophenyl) were prepared in good yields by the polycondensation polymerization of trans-[PtCl2(PBu3)2] with HC{triple bond, long}CRC{triple bond, long}CH under ambient conditions. The optical absorption and emission properties of these polymetallaynes were investigated and compared with their bimetallic molecular model complexes trans-[Pt(Ph)(PEt3)2C{triple bond, long}CRC{triple bond, long}CPt(Ph)(PEt3)2] as well as their group 11 gold(I) and group 12 mercury(II) neighbors [(PPh3)AuC{triple bond, long}CRC{triple bond, long}CAu(PPh3)] and [MeHgC{triple bond, long}CRC{triple bond, long}CHgMe]. The structures of all the compounds were confirmed by spectroscopic methods and by X-ray crystallography for selected model complexes. The influence of the heavy metal atom and the 9-aryl substituent of carbazole on the evolution of lowest electronic singlet and triplet excited states is critically characterized. It was shown that the organic-localized phosphorescence emission can be triggered readily by the heavy-atom effect of group 10-12 transition metals (viz., Pt, Au, and Hg) with the emission efficiency generally in the order Pt > Au > Hg. These carbazole-based organometallic materials possess high-energy triplet states of 2.68 eV or higher which do not vary much with the substituent of 9-aryl group.
KW - Acetylide
KW - Carbazole
KW - Gold
KW - Mercury
KW - Phosphorescence
KW - Platinum
UR - http://www.scopus.com/inward/record.url?scp=33747145198&partnerID=8YFLogxK
U2 - 10.1016/j.jorganchem.2006.06.006
DO - 10.1016/j.jorganchem.2006.06.006
M3 - Journal article
AN - SCOPUS:33747145198
SN - 0022-328X
VL - 691
SP - 4028
EP - 4041
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 19
ER -