State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, 210093, Nanjing, People's Republic of China.
Chirality. 2013 Jul;25(7):384-92. doi: 10.1002/chir.22149. Epub 2013 Jun 6.
Two couples of enantiomeric platinum(II) complexes: Pt(L1a )Cl (1a), Pt(L1b )Cl (1b) and Pt(L1a )(C ≡ C - Ph) (2a), Pt(L1b )(C ≡ C - Ph) (2b) (L1a = (+)-1,3-di-(2-(4,5-pinene)pyridyl)benzene, L1b = (-)-1,3-di-(2-(4,5-pinene)pyridyl)benzene) were synthesized and characterized. Their absolute configurations were determined by single crystal X-ray diffraction and further verified by circular dichroism (CD) spectra (including electronic circular dichroism [ECD] and vibrational circular dichroism [VCD]). These complexes show interesting mechanoluminescence and/or vapoluminescence due to crystalline-to-amorphous transformation. The crystalline solids, grinding-induced amorphous powders, and vapor-induced amorphous powders of complexes 2a and 2b were comparatively investigated by solid-state ECD and VCD spectra. The transformation from crystalline solids to amorphous powders was accompanied by significant variances of the spectral feature in both ECD and VCD spectra.
两对对映异构体铂（II）配合物：Pt(L1a)Cl(1a)、Pt(L1b)Cl(1b)和 Pt(L1a)(C≡C-Ph)(2a)、Pt(L1b)(C≡C-Ph)(2b)（L1a=（+）-1,3-双-(2-(4,5-蒎烯)吡啶基)苯，L1b=（-）-1,3-双-(2-(4,5-蒎烯)吡啶基)苯）被合成并进行了表征。它们的绝对构型通过单晶 X 射线衍射确定，并通过圆二色性（CD）光谱（包括电子圆二色性[ECD]和振动圆二色性[VCD]）进一步验证。这些配合物由于晶态到非晶态的转变而表现出有趣的机械发光和/或蒸气发光。通过固态 ECD 和 VCD 光谱比较研究了配合物 2a 和 2b 的晶体固体、研磨诱导的非晶粉末和蒸气诱导的非晶粉末。从晶体固体到非晶粉末的转变伴随着 ECD 和 VCD 光谱中光谱特征的显著变化。
