@article{Dang2026, 
author = {Lingyan Dang and GuanXing Li and Shuailing Ma and Chunyan Zhao and Zhenxing Yang and Yanjun Liu and Peng Wang and Yuchen Shang and Shifeng Niu and Tian Cui and Chunguang Zhai and Mingguang Yao},
title = {Unraveling multichannel charge transfer via piezochromic behavior in copper-phenylacetylide},
year = {2026},
journal = {Nano Research},
keywords = {copper-phenylacetylide, luminescence, piezochromic materials, pressure},
url = {https://www.sciopen.com/article/10.26599/NR.2026.94909129},
doi = {10.26599/NR.2026.94909129},
abstract = {The intrinsic competition among multiple charge-transfer (CT) pathways in copper-phenylacetylide (PhC2Cu) has hindered the desirable development of its photoactive properties, whereas substantial spectral and temporal overlap among these pathways has obscured direct mechanistic understanding. Herein, hydrostatic pressure is employed as a clean and reversible external stimulus to continuously compress the one-dimensional Cu(I)-Cu(I) ladder in pristine PhC2Cu without modifying its chemical composition. In situ high-pressure photoluminescence and transient absorption spectroscopy reveal a pressure-induced evolution of CT from copper to the acetylide carbon. High-pressure crystallographic analysis and X-ray absorption near-edge structure measurements demonstrate that anisotropic contraction of the Cu(I) ladder reconstructs the copper coordination environment and consequently modulates the relative contributions of metal-to-ligand CT pathways. These structure-dependent electronic dynamics provide direct insight into the CT mechanism of PhC2Cu and establish hydrostatic pressure as a general and non-destructive strategy for investigating CT processes in one-dimensional (1D) coordination compounds.}
}