Long-afterglow metal–organic frameworks: reversible guest-induced phosphorescence tunability

Abstract

We report that two types of Zn-terephthalate (TPA) MOFs (namely [Zn(TPA)(DMF)] (1-DMF) and MOF-5) could exhibit an obvious room-temperature afterglow emission with a time-resolved luminescence lifetime as high as 0.47 seconds.

Layered host–guest long-afterglow ultrathin nanosheets: high-efficiency phosphorescence energy transfer at 2D confined interface

“…31 The resulting host–guest nanohybrid materials exhibited long-lived green RTP (Fig. 2a, afterglow time range: 0–6 seconds), showing that formation of 2D intercalation nanohybrids is indeed a feasible alternative to crystallization as a means of increasing the phosphorescence lifetimes of such simple organic species.…”

Organic Room Temperature Phosphorescence Materials for Biomedical Applications

“…One is to facilitatie the intersystem crossing (ISC) from the lowest excited singlet state (S 1 ) to a triplet state (T n ) to populate the triplet excitons, and the other is to inhibit non‐radiative transitions from the lowest excited triplet state (T 1 ) to the ground state (S 0 ). On the basic of these factors, researchers have proposed various strategies and methods to moldulate phosphorescent performance, such as intruduction of heavy atoms, heteroatoms and aromatic carbony to boost SOC; while suppressing non‐radiation of the triplet excitons by host‐guest doping method crystalization and organic flameworks . Therefore, developing metal‐free organic luminescent materials with highly efficient room temperature phosphorescence has been becoming a hot topic in recent years …”

Facile, Quick, and Gram‐Scale Synthesis of Ultralong‐Lifetime Room‐Temperature‐Phosphorescent Carbon Dots by Microwave Irradiation

“…[1][2][3][4][5][6][7][8][9][10][11][12] However,achieving RTPmaterials is agreat challenge owing to the spin-forbidden nature of triplet exciton transitions.T od ate,R TP materials are still mainly limited to organometallic complexes and metal-free pure organic compounds, [1,2,11,[13][14][15][16] but all of them suffer from high cost and toxicity,s ensitivity to atmospheric oxygen, complicated preparation, and/or observable only in the crystalline/composite forms. [4,17] Therefore,itisstill highly desirable to develop novel RTPm aterials that featuring facile and quick preparation, are metal-free,have long lifetime,are cost effective,and have low toxicity. [4,17] Therefore,itisstill highly desirable to develop novel RTPm aterials that featuring facile and quick preparation, are metal-free,have long lifetime,are cost effective,and have low toxicity.…”