Short-Range Coulomb Interaction Is a Key to Switch the Utilization of Higher Triplet Excitons in Multiresonance Thermally Activated Delayed Fluorescence Doped Film.

Multiresonance thermally activated delayed fluorescence (MR-TADF) materials have attracted widespread attention due to ultrahigh definition display standards. However, many MR-TADF materials lack TADF properties in both the solution and solid states. Interestingly, the TADF characteristics appear once these MR-TADF compounds are doped in a suitable host film, but the precise mechanism involved in the host-guest interaction remains uncertain.

[Historical snail environments in Baoshan District, Shanghai City].

Objective: To understand the distribution and characteristics of historical snail environments in Baoshan District, Shanghai City, so as to provide the reference for adjusting and formulating the monitoring program of the snail situation in the future.

Methods: A retrospective survey and a field survey were conducted to collect the information of historical snail environments and set up the database. The distribution and characteristics of them were analyzed.