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oai:figshare.com:article/34018242 2026-09-28T19:03:35Z category_1 category_4 category_915 category_12 category_13 category_14 category_19 category_21 category_272 category_873 category_106 category_734 portal_63 item_type_6 month_year_09_2026

Luminescence Mechanochromism of an Anionic Dinuclear Copper Iodide Complex Alexia Rocheteau (25133064) Imen Zareb (25133067) Marie Cordier (1429681) Michael Paris (2485510) Jean-Yves Mevellec (1483330) Hélène Serier-Brault (3089421) Camille Latouche (1535920) Sandrine Perruchas (1357710) Biophysics Biochemistry Physical Sciences not elsewhere classified Cell Biology Genetics Molecular Biology Pharmacology Biotechnology Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Science Policy Biological Sciences not elsewhere classified transparent glass films occurs upon grinding nuclear magnetic resonance mechanically altered phase ionic dinuclear copper induces small changes environmentally friendly materials different emissive properties based mechanochromic compound analysis allowed quantification 2 –</ sup 159 ° c relatively low temperature mechanochromic luminescence properties mechanochromic crystalline films 590 nm ). p )< sub max </ sub 3 </ sub 2 </ sub partial crystalline luminescence mechanochromism developing low 535 nm state nmr reference state rare example range order molecular structure large panel constituting 23 congruently melting congruent melting article reports amorphous transformation amorphous state amorphous fraction This article reports the mechanochromic luminescence properties of a copper iodide complex formulated (PrPh₃P)₂[Cu₂I₄] (<b>1</b>), which displays a contrasted reversible emission color switch from green (λ_max = 535 nm) to yellow (λ_max = 565 nm), upon mechanical solicitations. In addition to being a rare example of an ionic dinuclear copper-based mechanochromic compound, this complex is capable of congruently melting at a relatively low temperature (159 °C) to form a yellow emissive glassy phase (λ_max = 590 nm). This amorphous state is considered as the reference state of the partial crystalline-to-amorphous transformation that occurs upon grinding. Comparison of these two amorphous phases helps mechanism investigations. In particular, solid-state NMR (nuclear magnetic resonance) analysis allowed quantification of the amorphous fraction, constituting 23% of the mechanically altered phase. Mechanical grinding disrupts long-range order and induces small changes in the molecular structure of [Cu₂I₄]^2– leading to different emissive properties. The thermochromic luminescence properties also displayed originate from the two independent emissive centers: (PrPh₃P)⁺ and [Cu₂I₄]^2–. Thanks to the combined luminescent mechanochromic properties and congruent melting of <b>1</b>, luminescent and transparent glass films and mechanochromic crystalline films were prepared, demonstrating its potential for developing low-cost and environmentally friendly materials for a large panel of applications. 2026-09-28T00:00:00Z Text Journal contribution 10.1021/acs.inorgchem.6c02630.s001 https://figshare.com/articles/journal_contribution/Luminescence_Mechanochromism_of_an_Anionic_Dinuclear_Copper_Iodide_Complex/34018242 CC BY-NC 4.0