Propylamino-connected Fluorescent Terpyridine Dimer and Trimer: Syntheses, Photophysical Properties and Formation of Duplex-Type Complexes with Cd(II)
Propylamino-connected Fluorescent Terpyridine Dimer and Trimer: Syntheses, Photophysical Properties and Formation of Duplex-Type Complexes with Cd(II)
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丙氨基连接的荧光三联吡啶二聚体和三聚体：合成、光物理性质以及与 Cd(II) 形成双链体复合物
DOI：
10.1039/c2ob26609a
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
K. Araki
中科院分区：
文献类型：
--
作者：
Y. Kamoya;K. Kojima;G. Tanaka;R. Tanaka;T. Mutai;K. Araki
以正丙胺为连接剂，合成了2，2 ′：6 ′，2 ′ ′-三联吡啶（tpy）的二聚体（L2）和三聚体（L3）。它们在354 nm处显示出最低能量的π-π * 吸收，在420 nm处显示出蓝色荧光，在溶液中具有中等的量子产率。光谱滴定、电喷雾电离质谱（ESI-MS）、1H-1H双标架核Overhauser效应相关光谱（ROESY）和结构模拟（MOPAC/PM5）表明，L2和L3分别与Cd（II）、[Cd2（L2）2] 4+和[Cd3（L3）2] 6+形成了多组分的配合物.在溶液中，配合物的发光很弱（量子产率Φ <0.005），而在固态时，配合物的发光增强，量子产率显著增加（Φ = 0.13）。
By using propylamine as a connector, a dimer (L2) and trimer (L3) of 2,2′:6′,2′′-terpyridine (tpy) are synthesized. They showed the lowest energy π–π* absorption at 354 nm and blue fluorescence at 420 nm with a moderate quantum yield in solution. Spectral titrations, electrospray ionization mass spectrometry (ESI-MS), 1H–1H rotating-frame nuclear Overhauser effect correlation spectroscopy (ROESY), and structure simulation (MOPAC/PM5) indicated that both L2 and L3 form duplex-type multi-component complexes with Cd(II), [Cd2(L2)2]4+ and [Cd3(L3)2]6+, respectively. While the luminescence of these complexes was quite weak in solution (quantum yield Φ < 0.005), the complexes showed enhanced emission in the solid state with remarkable increase of the quantum yield (Φ = 0.13).