Gigantic blue shift of two-photon-induced photoluminescence of interpenetrated metal-organic framework (MOF)
发布时间：2023-09-04
点击次数：
影响因子：8.4
DOI码：10.1515/nanoph-2023-0383
所属单位：Central South University
发表刊物：Nanophotonics
关键字：two-photon photoluminescence; blue shift; metal-organic framework
摘要：As an important means of modern science and technology, multiphoton fluorescence plays an essential role in high-resolution imaging, photochemistry, micro- and nano-processing, and clinical diagnosis. Multiphoton fluorescence usually shares the same radiative channel as its intrinsic fluorescence. Under multiphoton excitation, except for red shift fluorescence caused by the reabsorption effect, gigantic blue shift of multiphoton fluorescence is rarely reported. In this work, metal-organic frameworks (MOFs) with 7-fold and 8-fold interpenetration are successfully synthesized. The synthesized 8-fold interpenetrated MOFs show unexpectedly giant blue-shifted (~ 40 nm) two-photon induced fluorescence compared with its fluorescence emission. Specific optical selection rules lead to different final transition states in one-photon absorption and two-photon absorption. The density functional theory (DFT) and time-dependent density functional theory (TDDFT) simulations show that, under two-photon excitation, electrons and holes can be more delocalized, and intermolecular interactions mainly govern the emission process of 8-fold interpenetrated MOFs. Highly excited electronic states of the interpenetrated MOFs are effectively excited and emitted under two-photon excitation, thus generating the inevitable blue-shifted two-photon induced fluorescence emission. Our work provides a guide for exploring the excitation mechanism of fluorescent MOFs and offers an access to a tunable all-optical single-crystal device.
合写作者：Defeng Xu, Menglong Zhu, Yueting Wang, Junfan Feng, Chuancun Shu
第一作者：Zhihui Chen
论文类型：期刊论文
通讯作者：Si Xiao, Jianqiao Meng, Jun He
学科门类：理学
一级学科：物理学
文献类型：J
卷号：12
期号：19
页面范围：3781-3791
是否译文：否
发表时间：2023-09-04
收录刊物：SCI
发布期刊链接：https://www.degruyter.com/document/doi/10.1515/nanoph-2023-0383/html