Phase transformation induced mechanochromism in a platinum salt: a tale of two polymorphs

Abstract

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...

Chromic Platinum Complexes Containing Multidentate Ligands

“…Recently, Norton et al. uncovered the mechanochromic behavior of 30 , a fairly simple Pt(II) complex (Figure 15d) that crystallizes into two polymorphs [102] . Slow evaporation (ca.…”

Systematic photophysical, thermal and electrochemical analysis of a series of phenothiazine cored conjugated aromatic unit appended D–π–A based high-solid state luminescent materials: their applications in reversible mechanofluorochromic and volatile acid sensing

“…In this article, we have designed and synthesized (D-π-A) isomers, namely PT-Cn-(Ar)2 where, n = 2, 12 and Ar = phenyl (Ph), naphthyl (Nap), anthracenyl (An), phenanthryl (Pn), and Pyrenyl (Pr) units by appending the aromatic chromophores with increasing the conjugation from phenyl to pyrene ring with PT moiety via a vinylidene linkage. We have hypothesized that the non-planner donor and highly conjugated chromophoric units can act as a D-π-A system, and by virtue of butterfly conformations of the PT core, 43 The PT-derivatives were synthesized using literature procedures (ESI) and characterized using 1 H NMR, 13 C NMR spectroscopies, and ESI-mass spectrometry (Fig. S1-S36).…”

“…[6][7][8][9][10] Numerous materials with MFC characteristics such as organometallic compounds and typical organic dyes have been established. [11][12][13][14][15] Compared to metal-based MFC materials, which suffer from commercialization challenges owing to the high price and the toxicity of noble metals, organic compounds turn out to be favorable alternatives due to their facile synthetic strategy. These types of materials have attracted special attention from researchers because of their bright potentiality in security inks, 16 3D printing, 17,18 memory chips, 19 and mechanosensors 20,21 as they are susceptible to shearing, pressing, ball milling, and grinding, causing a variation in the fluorescence emission color.…”

Molecular copper iodide clusters: a distinguishing family of mechanochromic luminescent compounds

“…The majority of the mechanochromic luminescent compounds are based on organic molecules, [12][13][14] in comparison with the metal-based compounds. 15 The latter demonstrated nonetheless a rich variety of mechanochromic properties, mainly based on Au [16][17][18][19][20][21][22][23][24][25][26][27][28][29] and Pt [30][31][32][33][34][35][36][37][38][39][40][41] complexes. Examples of Zn, [42][43][44][45][46][47][48][49] Al, 50,51 Ir [52][53][54][55][56][57][58][59][60][61]…”