Temperature-Responsive Fluorescent Organoplatinum(II) Metallacycles.
Temperature-Responsive Fluorescent Organoplatinum(II) Metallacycles.
复制标题
温度响应荧光有机铂(II)金属环
DOI：
10.1021/jacs.8b04452
复制
发表时间：
2018-06-20
影响因子：
15
通讯作者：
Stang PJ
中科院分区：
文献类型：
--
作者：
Tang JH;Sun Y;Gong ZL;Li ZY;Zhou Z;Wang H;Li X;Saha ML;Zhong YW;Stang PJ
报道了两种荧光有机铂（II）金属-lacycles的合成、表征和温度响应性质。通过120°三芳胺配体L1分别与120°二铂（II）受体Pt-1或180 °二铂（II）受体Pt-2的配位驱动自组装，制备了金属杂环化合物M1和M2。M1和M2是六方金属杂环，分别由三个或六个自由旋转的蒽环组成。当温度在−20 ° C至60 °C之间变化时，配体会显示出不规则的发射变化，而两种金属杂环在THF中会显示出可逆的吸收和发射光谱变化。其绿色发射强度的变化也与温度变化呈线性相关，M1和M2的平均灵敏度分别为每°C-0.67%和-0.77%。此外，在配位溶剂中，如DMF和CH 3CN，M1和M2表现出不同的行为：在较低的温度范围内，即低于30 °C，它们的光谱变化与在THF中观察到的相似，然而，在较高的温度下，金属-lacycles被溶剂破坏，并显示出比率荧光响应，包括配体L1的青色发射。
The synthesis, characterization, and temperature-responsive properties of two fluorescent organoplatinum(II) metal-lacycles are reported. Metallacycles M1 and M2 were prepared via the coordination-driven self-assembly of a 120° triarylamine ligand L1 and a 120° diplatinum(II) acceptor Pt-1 or 180° diplatinum(II) acceptor Pt-2, respectively. M1 and M2 are hexagonal metallacycles, comprising of three or six freely rotating anthracene pendants on their periphery, respectively. In response to the temperature variation between −20 and 60 °C, the ligand displays irregular emission changes, whereas both metallacycles show reversible absorption and emission spectral changes in THF. The changes in their green emission intensity also exhibit a linear correlation to the temperature variation, with an average sensitivity of −0.67% and −0.77% per °C for M1 and M2, respectively. Furthermore, in coordinating solvents, such as DMF and CH3CN, M1 and M2 show different behaviors: in the lower temperature range, i.e. below 30 °C, their spectral changes are similar to what was observed in THF, however, at a higher temperature the metal-lacycles were destroyed by the solvents and displayed ratiometric fluorescent responses including a cyan emission of the ligand L1.
登录
查看更多内容
影响因子：
4.4
作者：
HAY, PJ;WADT, WR
通讯作者：
WADT, WR
影响因子：
15
作者：
Chan, Alan Kwun-Wa;Ng, Maggie;Yam, Vivian Wing-Wah
通讯作者：
Yam, Vivian Wing-Wah
影响因子：
56.9
作者：
Kaphan, David M.;Levin, Mark D.;Toste, F. Dean
通讯作者：
Toste, F. Dean
影响因子：
15
作者：
Gota, Chie;Okabe, Kohki;Uchiyama, Seiichi
通讯作者：
Uchiyama, Seiichi
影响因子：
4.3
作者：
Mondal, Pritam;Sarkar, Sabyasachi;Rath, Sankar Prasad
通讯作者：
Rath, Sankar Prasad