18929-60-7Relevant academic research and scientific papers
Mechanisms of orthogonal photodecarbonylation reactions of 3-hydroxyflavone-based acid-base forms
?tacko, Peter,Klán, Petr,Nachtigallová, Dana,Russo, Marina
, p. 3527 - 3537 (2020/03/25)
Carbon monoxide is a naturally occurring gasotransmitter combining inherent toxicity with a remarkable therapeutic potential and arduous administration. Photoactivatable carbon monoxide-releasing molecules (photoCORMs) are chemical agents that allow for precise spatial and temporal control over the CO release. In this work, we present a comprehensive mechanistic study of the photochemical CO release from 3-hydroxy-2-phenyl-4H-chromen-4-one, a π-extended 3-hydroxyflavone photoCORM, in methanol using steady-state and transient absorption spectroscopies and quantum chemical calculations. The multiplicity of the productive excited states and the role of oxygen (O2) in the CO production are emphasized, revealing a photoreaction dichotomy of the 3-hydroxyflavone acid and base forms. The utilization of three major orthogonal mechanistic pathways, all of which lead to the CO release, can fuel future endeavors to improve the CO release efficacy of 3-hydroxyflavone-based derivatives and refine their potential medical applications as photoCORMs.
Phenyl substituted pyridazine structure unit containing compounds and methods for their preparation and use
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Paragraph 0091-0092, (2016/11/17)
The invention discloses compounds containing phenyl substituted pyridazine structural unit, and a preparation method and application thereof. The structural general formula of the compounds containing phenyl substituted pyridazine structural unit is disclosed as Formula I. The compounds disclosed as Formula I have proper nuclear magnetic detection; and in order to solve the problems of less research on near-infrared materials and deficiency in high-efficiency high-stability near-infrared luminescent materials at present stage, the invention provides a series of near-infrared luminescent materials containing phenyl substituted pyridazine structure. The compounds have the advantages of accessible raw material, simple preparation process and high overall yield, and have important application value for researching development and application of near-infrared materials.
Synthesis and photophysical properties of dihydroheptacenes: New blue-emitting materials
Mondal, Rajib,Shah, Bipin K.,Neckers, Douglas C.
, p. 4085 - 4091 (2007/10/03)
7,16-Dihydroheptacenes (1-3) substituted at the 6, 8, 15, and 17 positions are synthesized as blue emitters potentially useful in organic light emitting diodes (OLEDs). The photophysical properties of 1-3 (λmax = 424-428 nm, ΦF = 0.15-0.21, τF = 2.35-2.67 ns in CH2Cl2) are discussed. They are shown to be stable and efficient blue emitters in the solid state (ΦF = 0.37-0.44). The X-ray crystal structure of 1 is reported.
