Delayed fluorometric analysis of chlorophyll c and pheophytin c.

Abstract

Thermally activated delayed fluorometry was applied to the analysis of chlorophyll c and pheophytin c of phytoplankton in natural water. Acetone extract of pigments was chromatographed over paper, and chlorophyll c on the chromatogram could be directly

Thermally Activated Delayed Fluorescence from Sn4+–Porphyrin Complexes and Their Application to Organic Light Emitting Diodes — A Novel Mechanism for Electroluminescence

“…We have proposed potential mechanisms to achieve compatibility of harvesting both singlet and triplet excitons and avoiding triplet annihilation by the use of thermally activated delayed fluorescence (TADF), [7,8] as shown in Figure 1. For TADF materials, heat accelerates the reverse intersystem-crossing (ISC) from a triplet excited state (T 1 ) to a singlet excited one (S 1 ), thus leading to an increase of the fluorescence intensity.…”

Difluorodithieno[3,2-a:2′,3′-c]phenazine as a strong acceptor for materials displaying thermally activated delayed fluorescence or room temperature phosphorescence

“…The use of heavy metals also contributes significantly to the cost of manufacture, raises health concerns related to their disposal, and fundamentally limits their applicability for deep-blue OLEDs due to electrochemical instability of the metal-ligand bonds. [4] In 2009, Adachi et al [5] applied the known mechanism of E-type delayed fluorescence [6,7] or thermally activated delayed fluorescence (TADF) [8] to organic electroluminescent devices for the first time. By harvesting otherwise non-emissive triplet states, TADF materials increased OLED efficiencies beyond the limits of normal fluorescence based devices and thus paved the way for a new generation of high-efficiency metal-free OLEDs.…”

Studies on Thermally Activated Delayed Fluorescence: Novel Exciton Formation Mechanism for OLEDs

“…One of the potential mechanisms to achieve compatibility of harvesting both singlet and triplet excitons and to avoid of triplet annihilation is use of thermally activated delayed fluorescence (TADF) [1][2][3]. In TADF materials, heat accelerates reverse intersystem-crossing (ISC) from a triplet excited state (T 1 ) to a singlet excited state (S 1 ), leading to an increase of the fluorescence intensity.…”