2026-10-11T06:10:57Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34024825 2026-09-29T15:37:15Z category_1 category_146 category_915 category_7 category_21 category_24 category_873 category_46 category_734 category_64 category_132 portal_63 item_type_6 month_year_09_2026

Particle Size Controls Phase Selectivity and Lattice Flexibility in Copper Triazolate Metal–Organic Framework Nanoparticles Audrey M. Davenport (19428260) Erik Svensson Grape (5855444) Emma E. Mahady (25137685) Samuel J. Weiss (25137688) Kentaro Kadota (4251217) Satoshi Horike (1521946) Samuel G. Dunning (5563796) Audrey N. Boeschoten (25137691) Parker S. Brodale (22903502) Christopher H. Hendon (1308372) Carl K. Brozek (1364121) Biophysics Space Science Physical Sciences not elsewhere classified Medicine Biotechnology Evolutionary Biology Chemical Sciences not elsewhere classified Immunology Biological Sciences not elsewhere classified Cancer Infectious Diseases triazolate )< sub tetragonal space group targeting specific polymorphs ta )< sub several theories exist previously unreported structure particle size dictates linker bonding becomes complements ongoing debates 200 nm furnishes sized crystals stabilize given crystallographic phase preparing particles smaller mofs ), despite 2 </ sub smaller particles bulk crystals phase stabilization phase selectivity whereas micron superior performance pressure spectroscopy orthorhombic symmetry lattice flexibility gas sorption even within conventional solids certain structures broader classes Stabilizing desirable polymorphs of solid-state materials has been at the forefront of materials research for decades. While several theories exist for targeting specific polymorphs of conventional solids, few strategies are available for metal–organic frameworks (MOFs), despite the superior performance of certain structures in gas sorption, luminescence, and other applications. Here, we report that particle size dictates the phase selectivity of the MOF Cu(1,2,3-triazolate)₂ (Cu(TA)₂). Whereas micron-sized crystals stabilize in a tetragonal space group at room temperature, preparing particles smaller than 200 nm furnishes a previously unreported structure with orthorhombic symmetry. A suite of variable-temperature and variable-pressure spectroscopy and X-ray diffraction analysis indicates that metal-linker bonding becomes more flexible in smaller particles, even within a given crystallographic phase. These results suggest smaller particles adopt phases impossible in bulk crystals because their softer lattices accommodate distorted geometriesan explanation that complements ongoing debates about the mechanism of phase stabilization in conventional solids. These results therefore provide potential design strategies for phase selectivity of MOFs and broader classes of materials in general. 2026-09-29T00:00:00Z Text Journal contribution 10.1021/acs.chemmater.6c01236.s001 https://figshare.com/articles/journal_contribution/Particle_Size_Controls_Phase_Selectivity_and_Lattice_Flexibility_in_Copper_Triazolate_Metal_Organic_Framework_Nanoparticles/34024825 CC BY-NC 4.0