Mechano-, thermo-, solvato-, and vapochromism in bis(acetato-κ<sup>1</sup>O)[4′-(4-(diphenylamino)phenyl)](2,2′:6′,2′′-terpyridine-κ<sup>3</sup>N,N′,N′′)zinc(<scp>ii</scp>) and its polymer
Distribution of the number of citations over years.