Barker Nathaniel M, Taylor Stephen D, Ferguson Ethan, Krause Jeanette A, Oliver Allen G, Connick William B, Zhang Peng
Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45220, United States.
Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States.
Inorg Chem. 2021 Oct 4;60(19):14731-14743. doi: 10.1021/acs.inorgchem.1c01868. Epub 2021 Sep 21.
Solvent plays a vital role in the recrystallization process and resulting crystallinity of materials. This role is of such importance that it can control the stability and utility of materials. In this work, the inclusion of a solvent in the crystalline lattice, specifically water, drastically affects the overall stability of two platinum polymorphs. [Pt(tpy)Cl]BF (tpy = 2,2';6'2″-terpyridine) crystallizes in three forms, red () and blue () polymorphs and a yellow nonsolvated form (). is the more stable of the two polymorphs, whereas loses crystallinity upon dehydration at ambient conditions resulting in the formation of . Close examination of the solid-state extended structures of the two polymorphs reveals that has a lattice arrangement that is more conducive to stronger intermolecular interactions compared to , thereby promoting greater stability. In addition, these two polymorphs exhibit unique vapochromic responses when exposed to various solvents.
溶剂在重结晶过程以及材料最终的结晶度方面起着至关重要的作用。这一作用极为重要，以至于它能够控制材料的稳定性和实用性。在这项工作中，晶格中包含溶剂，特别是水，会极大地影响两种铂多晶型物的整体稳定性。[Pt(tpy)Cl]BF（tpy = 2,2';6'2″-三联吡啶）以三种形式结晶，即红色（）和蓝色（）多晶型物以及黄色非溶剂化形式（）。是两种多晶型物中更稳定的一种，而在环境条件下脱水时会失去结晶度，从而形成。对这两种多晶型物的固态扩展结构进行仔细研究发现，与相比，具有一种更有利于更强分子间相互作用的晶格排列，从而促进了更高的稳定性。此外，这两种多晶型物在暴露于各种溶剂时表现出独特的气致变色响应。
