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One-Dimensional Sb(III) Halides with Orange Emission and White-Light Conversion Capability
Mingyue Chen1, Kunjie Liu2, Yun Zhang2
1National Demonstration Center for Experimental Materials Education, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
Abstract:
Organic-inorganic metal halides (OIMHs) have garnered significant attention in recent years due to their structural diversity and compositional tunability, showcasing exceptional photoluminescence properties and emerging as a hotspot in optoelectronic materials research. In this work, two one-dimensional compounds, (C5H14N2)3Sb4Cl18 and (C5H14N2)SbBr5 (C5H14N22+ = 2-methylpiperazine dication), were designed and synthesized, which crystallize in the P-1 and P212121 space groups, respectively. PL measurements reveal that (C5H14N2)3Sb4Cl18 exhibits a bright orange emission with the strongest peak at 630 nm. Combined density functional theory calculations and spectroscopic analyses further confirm that the emission originates from the inorganic units. A white light-emitting diode device was successfully fabricated by mixing (C5H14N2)3Sb4Cl18 powder with commercial green and blue phosphors and coating it onto an ultraviolet (UV) LED chip, which exhibits a high color rendering index of 93.8. This study provides a promising candidate for the development of high-performance, low-cost solid-state lighting materials.
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Alkyl Halides
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
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Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.

