Results 21 to 30 of about 9,982 (237)

Phosphorescence of Pyridoxal

open access: yesJournal of Biological Chemistry, 1969
Abstract The effect of pH on the relative distribution of pyridoxal structures in aqueous solution was examined by fluorescence spectroscopy. The hemiacetal structure, which is the predominant species at neutral pH, exhibits a symmetrical emission band at 378 mµ and is characterized by a quantum yield of 0.08.
J E, Wampler, J E, Churchich
openaire   +2 more sources

Benchmark Study on Phosphorescence Energies of Anthraquinone Compounds: Comparison between TDDFT and UDFT

open access: yesMolecules, 2023
Phosphorescent material is widely used in light-emitting devices and in the monitoring of cell phenomena. Anthraquinone compounds (AQs), as important phosphorescent materials, have potential applications as emitters for highly efficient organic light ...
Yujie Guo, Lingyu Zhang, Zexing Qu
doaj   +1 more source

Matrix‐free room‐temperature phosphorescence graphitic carbon nitride quantum dots based on halogen bond interactions for security applications

open access: yesNano Select, 2022
Herein, we first designed a one‐step strategy to achieve matrix‐free room temperature phosphorescence (RTP) materials by low temperature solid phase synthesis, using sodium citrate as carbon source and urea as nitrogen source.
Yuelin Kong   +3 more
doaj   +1 more source

Dual room‐temperature phosphorescence derived from the reversible homolysis in the high proportion n‐electron organic crystal [PDF]

open access: yesSmart Molecules, EarlyView.
[2,2′‐biisoindoline]‐1,1′,3,3′‐tetraone (4A2B) crystal with high n‐electrons undergoes photo‐induced reversible homolysis resulting in two room‐temperature phosphorescence (RTP). One of the 4A2B molecules responds strongly to 250 nm via fast intersystem crossing (ISC) processes among high‐lying excited states.
Junxiang Huang   +9 more
wiley   +2 more sources

Induction of long-lived room temperature phosphorescence of carbon dots by water in hydrogen-bonded matrices

open access: yesNature Communications, 2018
A long phosphorescence lifetime is desirable for imaging and detection, however, phosphorescence is often quenched in aqueous environments limiting applications. Here, Li et al.
Qijun Li   +5 more
doaj   +1 more source

A Highly Sensitive “on-off” Time-Resolved Phosphorescence Sensor Based on Aptamer Functionalized Magnetite Nanoparticles for Cadmium Detection in Food Samples

open access: yesFoods, 2020
Cadmium contamination is a severe threat to food safety. Therefore, the development of sensitive and selective cadmium detection strategies is urgently required. The elimination of background autofluorescence generated from the food matrix is critical to
Bin Lai   +5 more
doaj   +1 more source

Modulating Room-Temperature Phosphorescence-To-Phosphorescence Mechanochromism by Halogen Exchange

open access: yesFrontiers in Chemistry, 2022
Modulating the stimulus-responsiveness of a luminescent crystal is challenging owing to the complex interdependent nature of its controlling factors, such as molecular structure, molecular conformation, crystal packing, optical properties, and ...
Yoshika Takewaki   +2 more
doaj   +1 more source

Long phosphorescence properties of iridium complexes with different N^N ligands

open access: yes上海师范大学学报. 自然科学版, 2020
Long phosphorescence imaging eliminates the real-time light irradiation and gets a higher signal-to-noise ratio than traditional fluorescence imaging.
HOU Yutong   +3 more
doaj   +1 more source

Biobased and biodegradable films exhibiting circularly polarized room temperature phosphorescence

open access: yesNature Communications
There is interest in developing sustainable materials displaying circularly polarized room-temperature phosphorescence, which have been scarcely reported.
Mengnan Cao   +9 more
doaj   +1 more source

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