An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the joint CCDC and FIZ Karlsruhe Access Structures service and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the joint CCDC and FIZ Karlsruhe Access Structures service and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Mixed-ligand and anion-templated strategies in constructing metal nanoclusters are intricate and ingenious processes that face challenges to be studied. Herein, we report a cationic [Ag13(MoO4)4(SC6H4iPr)2(dppp)8]3+ (Ag13) nanocluster, which is templated using four [MoO4]2− anions and coprotected by 4-isopropylphenol (iPrC6H4S−) and 1,3-bis (diphenylphosphino) propane (dppp). Two capped (Ag4SC6H4iPr)2 units connect with the middle Ag@Ag4 layer via four [MoO4]2− anion templates to form a three-layer D4h-symmetric structure. An ideal crystallographic fourfold axis passes through the central Ag atom and the S and C atoms of the iPrC6H4S− ligand. The layer stacking generates a nonface-centered cubic (nonFCC) structure. The structure and composition of the Ag13 nanocluster have been fully characterized. In addition, the solid ultraviolet–visible (UV–vis) spectra show that Ag13 is a potential narrow-band-gap semiconductor. The photoluminescence (PL) of orange-yellow-light emission is attributed to ligand-to-metal charge transfer. This work has advanced the research on shell engineering of anionic templates and coprotection to assemble high-symmetric Ag nanoclusters.
A new one-dimensional Cd-based hybrid halide with face-sharing CdCl6 octahedral chains exhibited a bright white-light emission upon ultraviolet photoexcitation.
As an important branch of nonlinear optical (NLO) switches, second-harmonic-generation (SHG) switches undergoing reversible SHG-on and SHG-off states upon external stimuli exposure have been the focus of intense scientific research due to their potential applications in photoelectric technologies. The high-contrast switching of SHG, a key issue for the potential applications of SHG optical switches, has been a challenge but is undoubtedly very interesting. Incorporating stimuli-responsive molecules into the SHG-active materials is an efficient approach to construct high-contrast SHG switches. In this paper, by using the ligand 1-(4-cyanobenzyl)-4,4′-bipyridinium (CBbpy) as a photosensitive group, a noncentrosymmetric photochromic zinc–viologen framework, {[(CBbpy)Zn3(TBC)(HTBC)(OH)]·NO3}n (1; H3BTC = 1,3,5-benzenetricarboylic acid), has been obtained. It shows an SHG intensity of 1.1 × KH2PO4 (KDP) due to the synergistic effect of the coplanar and parallel arrangement of NO3– anions, the asymmetric disposition of electron densities, and the large permanent dipole moment, as confirmed by Bader charge and dipole moment calculations. More importantly, an outstanding SHG switching contrast was found to be at least 23 times larger than that of the coloration sample under a 1064 nm laser beam, originating from the large difference in the dipole moment and the self-absorption effect before and after coloration. Such excellent SHG switching is reversible and can be cycled several times, indicating that 1 is a good candidate as a new solid-state SHG-switching material. This work should prompt researchers to explore novel high-performance SHG switches based on devisable stimuli-responsive groups.
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