TY - JOUR
T1 - Direct emission from quartet excited states triggered by upconversion phenomena in solid-phase synthesized fluorescent lead-free organic-inorganic hybrid compounds
AU - Jana, Atanu
AU - Zhumagali, Shynggys
AU - Ba, Qiankai
AU - Nissimagoudar, Arun S.
AU - Kim, Kwang S.
N1 - Funding Information:
This work was supported by the NRF (National Honor Scientist Program: 2010-0020414) and the KISTI (KSC-2018-CHA-0057, KSC-2018-CRE-0077).
Publisher Copyright:
This journal is © The Royal Society of Chemistry.
PY - 2019
Y1 - 2019
N2 - We report, for the first time, the solid-phase gram-scale synthesis of two lead-free, zero-dimensional (0D) fluorescent organic-inorganic hybrid compounds, [Bu4N]2[MnBr4] (1) and [Ph4P]2[MnBr4] (2), achieved by grinding the organic and inorganic precursor salts. The solid-phase synthetic route has several advantages for modulating molecular dimensionalities. During grinding, organic cations and Mn2+ cations are co-crystallized together in the solid-state, forming a 0D assembly at the molecular level where each individual metal center is surrounded by organic cations. Both compounds exhibit an emission peak at 520 nm and a photoluminescence (PL) quantum yield (QY) of 47%. Here, we also report, for the first time, the upconversion phenomena which trigger different emission energies occurring in different quartet states of Mn, 4T1(4G), 4T2(4G), 4A1(4G), 4E(4G), 4T2(4D), 4E(4D), and 4T1(4P). These optical properties are unusual phenomena which break Kasha's rule of emission. Single particle imaging and low-Temperature PL measurement are performed to obtain a deeper insight into these ground products. These results pave a new path to develop highly fluorescent non-Toxic hybrid compounds with remarkable optical properties.
AB - We report, for the first time, the solid-phase gram-scale synthesis of two lead-free, zero-dimensional (0D) fluorescent organic-inorganic hybrid compounds, [Bu4N]2[MnBr4] (1) and [Ph4P]2[MnBr4] (2), achieved by grinding the organic and inorganic precursor salts. The solid-phase synthetic route has several advantages for modulating molecular dimensionalities. During grinding, organic cations and Mn2+ cations are co-crystallized together in the solid-state, forming a 0D assembly at the molecular level where each individual metal center is surrounded by organic cations. Both compounds exhibit an emission peak at 520 nm and a photoluminescence (PL) quantum yield (QY) of 47%. Here, we also report, for the first time, the upconversion phenomena which trigger different emission energies occurring in different quartet states of Mn, 4T1(4G), 4T2(4G), 4A1(4G), 4E(4G), 4T2(4D), 4E(4D), and 4T1(4P). These optical properties are unusual phenomena which break Kasha's rule of emission. Single particle imaging and low-Temperature PL measurement are performed to obtain a deeper insight into these ground products. These results pave a new path to develop highly fluorescent non-Toxic hybrid compounds with remarkable optical properties.
UR - http://www.scopus.com/inward/record.url?scp=85075796791&partnerID=8YFLogxK
U2 - 10.1039/c9ta08268a
DO - 10.1039/c9ta08268a
M3 - Article
AN - SCOPUS:85075796791
SN - 2050-7488
VL - 7
SP - 26504
EP - 26512
JO - JOURNAL OF MATERIALS CHEMISTRY A
JF - JOURNAL OF MATERIALS CHEMISTRY A
IS - 46
ER -
