Photochromic Polyoxometalate/Perylenediimide Donor-Acceptor Hybrid Crystals with Interesting Luminescent Properties

Ming-Hua You; Meng-Hua Li; Yi-Ming Di; Shu-Quan Zhang; Mei-Jin Lin

doi:10.1021/acs.inorgchem.1c02361

Photochromic Polyoxometalate/Perylenediimide Donor-Acceptor Hybrid Crystals with Interesting Luminescent Properties

Inorg Chem. 2022 Jan 10;61(1):105-112. doi: 10.1021/acs.inorgchem.1c02361. Epub 2021 Dec 17.

Authors

Ming-Hua You^{1

2}, Meng-Hua Li², Yi-Ming Di², Shu-Quan Zhang³, Mei-Jin Lin^{2

4}

Affiliations

¹ College of Materials Science and Engineering, Fujian University of Technology, Fuzhou 350118, China.
² Key Laboratory of Molecule Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou 350108, China.
³ College of Zhicheng, Fuzhou University, Fuzhou 350002, China.
⁴ College of Materials Science and Engineering, Fuzhou University, Fuzhou 350116, China.

PMID: 34918511
DOI: 10.1021/acs.inorgchem.1c02361

Abstract

The self-assembly of electron-deficient protonated N, N'-dipyridyltetrachloroperylenediimide (4Cl-DPPDI) and electron-rich polyoxometalate acids H_nXM₁₂O₄₀ (POMs; X = P or Si; M = W or Mo) resulted in four isomorphous donor-acceptor hybrid crystals 1-4 with segregated POM anions and one-dimensional racemic hydrogen-bonded 4Cl-DPPDI networks as electron-donor and -acceptor components, respectively. Because of the compact contacts between the POM anions and 4Cl-DPPDI tectons induced by anion-π interactions, besides enhanced photochromism, these four unique isostructural hybrids exhibited unusual room-temperature phosphorescence (RTP) emissions. More interestingly, owing to the facial compact contacts of two racemic 4Cl-DPPDI tectons induced by lone pair-π-assisted π-π interactions, they also showed unprecedented photon upconversion by triplet-triplet annihilation (TTA).