Microhydration of 2-Naphthol at Ground, First Excited Triplet, and First Excited Singlet States: A Case Study on Photo Acids

2018 ◽  
Vol 122 (4) ◽  
pp. 929-936 ◽  
Author(s):  
Parvathi Krishnakumar ◽  
Rahul Kar ◽  
Dilip Kumar Maity
Keyword(s):  
Excited Singlet ◽  
Excited Triplet ◽  
Singlet States ◽  
Excited Singlet States

Fluorene-Type Polymer Photodetectors Doped with Iridium and Platinum Complexes as Opto-Electrical Conversion Devices

2012 ◽  
Vol 1435 ◽  
Author(s):  
Hirotake Kajii ◽  
Hiroki Ohmori ◽  
Yusuke Sato ◽  
Akihiro Katsura ◽  
Yutaka Ohmori
Keyword(s):  
Conversion Efficiency ◽  
Solution Process ◽  
Platinum Complexes ◽  
Triplet States ◽  
Excited Singlet ◽  
Excited Triplet ◽  
Optical Links ◽  
Singlet States ◽  
Excited Singlet States ◽  
Excited Triplet States

ABSTRACTTo improve the conversion efficiency of polymer photodetectors (PDs) fabricated by solution process, the properties of fluorene-type polymer photodetectors doped with iridium (Ir) and platinum (Pt) complexes were investigated. The devices based on poly(dioctylfluorene) and poly(dioctylfluorene-co-benzothiadiazole) (F8BT) had violet and blue sensitivity, respectively. Triplet materials can enhance the incident-photon-to-current conversion efficiency of the devices utilizing the fluorene-type polymers when their triplet levels are lower than the lowest excited singlet states of the host and higher than the lowest excited triplet states of the host. The transmission of a moving picture was successfully demonstrated using the bilayer F8BT device with green Ir complex as an opto-electrical conversion device. We demonstrate that the polymer PDs fabricated by solution process can be applied to short-range optical communication fields, such as opto-electrical conversion devices for optical links.

Nanosecond flash photolysis

1970 ◽  
Vol 315 (1521) ◽  
pp. 163-184 ◽  
Keyword(s):  
Flash Photolysis ◽  
Pulsed Laser ◽  
Triplet States ◽  
Excited Singlet ◽  
Excited Triplet ◽  
Singlet States ◽  
Time Region ◽  
Excited Singlet States ◽  
Chemical Events ◽  
Excited Triplet States

A flash photolysis system, using a pulsed laser as source, has been designed and used to study events having a duration of a few nanoseconds; an improvement over conventional flash techniques by a factor of a thousand. The apparatus incorporates both spectrographic and photoelectric monitoring techniques which are easily interchangeable and, apart from the laser itself, it is readily constructed from standard components. Its applications to the observation of the absorption spectra of excited singlet states, short-lived excited triplet states and chemical events in the nanosecond time region are described.

Quasiparticle Excitations in Polyenes and Polyacetylene

1987 ◽  
Vol 109 ◽  
Author(s):  
Paul Tavan ◽  
Klaus Schulten
Keyword(s):  
Dispersion Relations ◽  
Excited Singlet ◽  
Quasi Particle ◽  
Double Excitation ◽  
Singlet States ◽  
Excited Singlet States ◽  
Electron Excitations ◽  
Quasiparticle Excitations

ABSTRACTWe apply the Pariser-Parr-Pople Hamiltonian to study many-electron excitations in polyenes and polyacetylene. The excited singlet states of polyenes, calculated by a multireference double excitation expansion, are classified as quasi-particle excitations, namely as triplet-triplet magnons and particle-hole excitons. From finite polyene spectra we derive approximate dispersion relations for these quasi-particles in the infinite polyene, i.e. polyacetylene.

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