A 1D Cu(i)–I-pyrazine coordination polymer with controlled pressure-induced phase transition and opto-electronic response depending on mechanical stimuli, temperature, and CuI content

Abstract

In this work, we have synthesized a new luminescent and semiconducting coordination polymer (CP) based on [CuI(PyzBr)]n staircase double Cu(I)-I chains where the 2-bromopyrazine ligand (PyzBr) was selected as N-donor...

2D Cu(I)-I Coordination Polymer with Smart Optoelectronic Properties and Photocatalytic Activity as a Versatile Multifunctional Material

“…The results obtained from this experiment facilitate the calculation of the isothermal equation of state and the bulk modulus ( V 0 = 444.39(7) Å 3 , K 0 = 11.6(5) GPa, and K ’ 0 = 9.2(8)) (see Section S5 of the Supplementary Information, Table S3, and Figures S10–S12). These findings elucidate the degree of material compressibility, which falls within the range typically observed for organometallic compounds and exhibits similarities to other recently published Cu­(I)-I CPs. , The fitting procedure was performed utilizing the EosFit7-GUI program employing the BM3 equation of state. As observed, this compound has an anisotropic behavior in its compressibility, with the b axis being much softer than the other two unit-cell axes.…”

“…9−12 These CPs exhibit luminescence responding to pressure, temperature, the presence of gases, etc. 13,14 As a result, they are well-suited substances for sensors that are both thermochromic and mechanochromic simultaneously 15 with various industrial applications, such as aerospace, nuclear, food, packaging, and medicine. 16 On the other hand, advances in experimental techniques in recent years are opening new perspectives in the production of functional materials under more extreme conditions of pressure or temperature.…”

“…An interesting CP family, due to its optoelectronic properties, is Cu­(I)-halogen CPs, which are more affordable compared to other luminescent CPs based on noble metals or lanthanides . In particular, extensive research has been conducted on Cu­(I)-I double chain-based coordination polymers due to their remarkable structural flexibility as well as their noteworthy characteristics in luminescence and semiconducting behavior. − These CPs exhibit luminescence responding to pressure, temperature, the presence of gases, etc. , As a result, they are well-suited substances for sensors that are both thermochromic and mechanochromic simultaneously with various industrial applications, such as aerospace, nuclear, food, packaging, and medicine …”

“…On the other hand, advances in experimental techniques in recent years are opening new perspectives in the production of functional materials under more extreme conditions of pressure or temperature. − Indeed, previous studies of this type of Cu­(I)-I CPs have correlated structure and photoluminescence (PL) in response to hydrostatic pressure or grinding …”

“…17−21 Indeed, previous studies of this type of Cu(I)-I CPs have correlated structure and photoluminescence (PL) in response to hydrostatic pressure or grinding. 14 However, as far as our understanding goes, there has been limited exploration of the optical and electrical properties of flexible two-dimensional (2D) systems when subjected to hydrostatic pressure, with only a few examples observed in the context of porous three-dimensional (3D) CPs. 22,23 Solid-state conductivity can be regulated by the application of high pressures, which leads to modifications in lattice parameters, electron−lattice interactions, and band gap.…”