Dynamic Hydrogen-Bond Network Mediates Concurrent Anti-Thermal Quenching and Blueshift in a Zero-Dimensional Hybrid Material

We engineered a dynamic hydrogen-bonded “molecular straitjacket” in the zero-dimensional antimony chloride (H 2 cpp)(Hfa)SbCl 6 via a mixed-cation strategy. In-situ variable-temperature single-crystal diffraction directly reveals that this network contracts within a specific thermal window, forcing a structural rigidification of the luminescent octahedron. This simultaneously suppresses non-radiative loss (leading to emission enhancement, ATQ) and attenuates exciton-lattice coupling (causing a spectral blueshift). This work provides atomistic insights and a design blueprint for rationally engineering stimuli-responsive luminescent materials through dynamic supramolecular interfaces .