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2. Outlook

Author

Hong, Maochun, Wu, Yicheng, Yan, Chunhua, Li, Yuliang, Wang, Jiyang, Chen, Xianhui, Xu, Jingjun, Chen, Yongjun, Chen, Rong, Huang, Baosheng, Fu, Xuefeng, Yang, Junlin, Zhang, Shouzhu, Chen, Kexin, Wang, Qidong, He, Jie, Lu, Hongcheng, Zou, Guohong, Yang, Wei, Editor-in-Chief, and Hong, Maochun, editor

Published
2023
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3. Project Overview

Author

Hong, Maochun, Wu, Yicheng, Yan, Chunhua, Li, Yuliang, Wang, Jiyang, Chen, Xianhui, Xu, Jingjun, Chen, Yongjun, Chen, Rong, Huang, Baosheng, Fu, Xuefeng, Yang, Junlin, Zhang, Shouzhu, Chen, Kexin, Wang, Qidong, He, Jie, Lu, Hongcheng, Zou, Guohong, Yang, Wei, Editor-in-Chief, and Hong, Maochun, editor

Published
2023
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4. Research in China and Abroad

Author

Hong, Maochun, Wu, Yicheng, Yan, Chunhua, Li, Yuliang, Wang, Jiyang, Chen, Xianhui, Xu, Jingjun, Chen, Yongjun, Chen, Rong, Huang, Baosheng, Fu, Xuefeng, Yang, Junlin, Zhang, Shouzhu, Chen, Kexin, Wang, Qidong, He, Jie, Lu, Hongcheng, Zou, Guohong, Yang, Wei, Editor-in-Chief, and Hong, Maochun, editor

Published
2023
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5. Major Research Achievements

Author

Hong, Maochun, Wu, Yicheng, Yan, Chunhua, Li, Yuliang, Wang, Jiyang, Chen, Xianhui, Xu, Jingjun, Chen, Yongjun, Chen, Rong, Huang, Baosheng, Fu, Xuefeng, Yang, Junlin, Zhang, Shouzhu, Chen, Kexin, Wang, Qidong, He, Jie, Lu, Hongcheng, Zou, Guohong, Yang, Wei, Editor-in-Chief, and Hong, Maochun, editor

Published
2023
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27. Large second harmonic generation of LiCs2PO4 caused by the metal-cation-centered groups

Author

Cheng, Xiyue, Whangbo, Myung-Hwan, Guo, Guo-Cong, Hong, Maochun, and Deng, Shuiquan

Subjects
Condensed Matter - Materials Science
Abstract

We evaluated the individual atom contributions to the second harmonic generation (SHG) coefficients of LiCs2PO4 (LCPO) by introducing the partial response functionals on the basis of first principles calculations. The SHG response of LCPO is dominated by the metal-cation-centered groups CsO6 and LiO4, not by the nonmetal-cation-centered groups PO4 one expects from the existing models and theories. The SHG coefficients of LCPO are determined mainly by the occupied orbitals O-2p and Cs-5p as well as by the unoccupied orbitals Cs-5d and Li-2p. For the SHG response of a material, the polarizable atomic orbitals of the occupied and the unoccupied states are both important.

Published
2018
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38. Mn2+–Mn2+ Dimers Induced Robust Light Absorption in Heavy Mn2+ Doped ZnAl2O4 Near‐Infrared Phosphor with an Excellent Photoluminescence Quantum Yield and Thermal Stability.

Author

Zhan, Chenyang, Zhu, Haomiao, Liang, Sisi, Nie, Wendong, Wang, Zihao, and Hong, Maochun

Subjects
THERMAL stability, DIMERS, PHOSPHORS, TRANSITION metal ions, PHOTOLUMINESCENCE, PHOTOLUMINESCENCE measurement, LIGHT absorption
Abstract

Transition metal ions, such as Cr3+, Fe3+, and Ni2+, are widely recognized activators for efficient broadband near‐infrared (NIR) phosphors. However, the potential of Mn2+ ions as NIR‐emitting activators is relatively overlooked due to their typically narrowband emission in the visible spectral region and relatively weak absorption. Herein, a heavy Mn2+‐doped Zn1‐xAl2O4: xMn2+ (ZAO: xMn2+) phosphor is presented that exhibits a single NIR emission band peaked at 830 nm with a bandwidth of 135 nm under excitation at 450 nm. Through comprehensive structural and spectral analysis, this NIR band is attributed to the emission originating from Mn2+ ions within the MnO6 octahedra. Importantly, the formation of Mn2+–Mn2+ dimers breaks the spin‐forbidden rule and significantly enhances the transition probability, as supported by the excited state dynamic analysis. Consequently, the optimal ZAO: 0.70Mn2+ sample shows high internal/external photoluminescence quantum yields of 85.8%/36.9%, along with good thermal stability demonstrated by the emission intensity at 423 K retains 60% of that at 298 K. Finally, a prototype NIR pc‐LED device is fabricated by combining ZAO: 0.70Mn2+ phosphor with a 450 nm blue diode chip, generating an NIR output power of 28.84 mW at 100 mA. This study provides novel insights into high‐performance Mn2+‐activated NIR phosphors. [ABSTRACT FROM AUTHOR]

Published
2024
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40. Ideal Cage‐like Pores for Molecular Sieving of Butane Isomers with High Purity and Record Productivity.

Author

Ji, Zhenyu, Zhou, Yunzhe, Chen, Cheng, Yuan, Daqiang, Wu, Mingyan, and Hong, Maochun

Subjects
MOLECULAR sieves, ISOMERS, BUTANE, ADSORPTION isotherms, MANUFACTURING processes
Abstract

n‐C4H10 and iso‐C4H10 are both important petrochemical raw materials. Considering the coexistence of the isomers in the production process, it is necessary to achieve their efficient separation through an economical way. However, to obtain high‐purity n‐C4H10 and iso‐C4H10 in one‐step separation process, developing iso‐C4H10‐exclusion adsorbents with high n‐C4H10 adsorption capacity is crucial. Herein, we report a cage‐like MOF (SIFSIX‐Cu‐TPA) with small windows and large cavities which can selectively allow smaller n‐C4H10 enter the pore and accommodate a large amount of n‐C4H10 simultaneously. Adsorption isotherms reveal that SIFSIX‐Cu‐TPA not only completely excludes iso‐C4H10 in a wide temperature range, but also exhibits a very high n‐C4H10 adsorption capacity of 94.2 cm3 g−1 at 100 kPa and 298 K, which is the highest value among iso‐C4H10‐exclusion‐type adsorbents. Breakthrough experiments show that SIFSIX‐Cu‐TPA has excellent n/iso‐C4H10 separation performance and can achieve a record‐high productivity of iso‐C4H10 (3.2 mol kg−1) with high purity (>99.95 %) as well as 3.0 mol kg−1 of n‐C4H10 (>99 %) in one separation circle. More importantly, SIFSIX‐Cu‐TPA can realize the efficient separation of butanes at different flow rates, temperatures, as well as under high humid condition, which indicates that SIFSIX‐Cu‐TPA can be deemed as an ideal platform for industrial butane isomers separation. [ABSTRACT FROM AUTHOR]

Published
2024
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