Journal
INORGANIC CHEMISTRY
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.2c02555
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Funding
- JSPS KAKENHI [JP22H05144]
- JSPS [JP21K18936, JP20K22554, JP21H01905]
- Cooperative Research Program of Network Joint Research Centre for Materials and Devices
- Kyushu Synchrotron Light Research Center (SAGA-LS) [2107066F, 2110113F, 2203008F]
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In this study, it is demonstrated that a molecular organic-inorganic hybrid crystal can undergo polarity switching induced by water vapor and exhibit proton conduction and second-harmonic-generation-active properties.
Chemical responsivity in materials is essential to build systems with switchable functionalities. However, polarity-switchable materials are still rare because inducing a symmetry breaking of the crystal structure by adsorbing chemical species is difficult. In this study, we demonstrate that a molecular organic-inorganic hybrid crystal of (NEt4)(2)[MnN(CN)(4)] (1) undergoes polarity switching induced by water vapor and transforms into a rare example of proton-conducting second-harmonic-generation-active material. Centrosymmetric 1 transforms into noncentrosymmetric polar 1middot3H(2)O and 1middotMeOH by accom-modating water and methanol molecules, respectively. However, only water vapor causes a spontaneous single-crystal-to-single-crystal transition. Moreover, 1middot3H(2)O shows proton conduction with 2.3 x 10(-6 )S/cm at 298 K and a relative humidity of 80%.
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