Norton Amie E, Abdolmaleki Mahmood Karimi, Liang Jiamin, Sharma Malvika, Golsby Robert, Zoller Ann, Krause Jeanette A, Connick William B, Chatterjee Sayandev
Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221, USA.
Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA.
Chem Commun (Camb). 2020 Sep 1;56(70):10175-10178. doi: 10.1039/d0cc03436c.
Red crystals of [Pt(tpy)Cl]NO3·HNO3 show mechanochromic behaviour turning yellow when pressure is applied. The electronic character and spectroscopic signature of the red and yellow polymorphs change as a result of slipping of the molecular stacking planes in the solid state. The slippage alters the PtPt intermolecular distances from a linear stacked motif with <3.5 Å separations in the red polymorph to a less stacked motif of alternating short intradimer and long interdimer interactions in the yellow polymorph.
[Pt(tpy)Cl]NO₃·HNO₃的红色晶体表现出机械变色行为，施加压力时会变成黄色。由于固态中分子堆积平面的滑移，红色和黄色多晶型物的电子特性和光谱特征发生了变化。这种滑移将Pt-Pt分子间距离从红色多晶型物中具有<3.5 Å间距的线性堆积基序改变为黄色多晶型物中交替出现的短二聚体内和长二聚体间相互作用的较少堆积基序。
