The Synthesis of 1,3-Diphenyldihydroisobenzofurans, 1,3-Diphenylisobenzofurans and o-Dibenzoylbenzenes from the Diene Addition Products to Dibenzoylethylene
Two water soluble1O2 traps: dipotassium 1,3 - diphenylisobenzofuran - 5,6 - dicar☐ylate and tetrapotassium 9,10 - diphenylanthracene - 2,3,6,7 - tetracar☐ylate have been prepared in good yields and a new access to the anthracene skeleton is described. The key-step of this synthesis consists of a cycloaddition between 1,3 - diphenylisobenzofurans and dimethyl 7 - oxabicyclo[2.2.1] - 5 - heptene - 2
制备了两个水溶性1 O 2捕集阱:1,3-二苯基异苯并呋喃-5-钾-5,6-二羧酸☐酯和9,10-二苯基蒽-2,3,6,7-四羧酸☐酯的高产率制备了一种新的描述了对蒽骨架的访问。该合成的关键步骤包括1,3-二苯基异苯并呋喃与二甲基7-氧杂双环[2.2.1] -5-庚烯-2,3-二甲叉基羧酸酯之间的环加成;这样得到的加合物经过脱水得到相应的蒽。
Photopolymerization sensitizer composition
申请人:Kawasaki Kasei Chemicals Ltd.
公开号:US11352450B2
公开(公告)日:2022-06-07
The purpose of the present invention is to provide a photopolymerizable composition which can act as a photopolymerization sensitizer that is active against light having a wavelength falling within a wavelength range of from 300 to 500 nm, and which has such a property that coloring of a cured product produced by polymerizing a photopolymerizable composition containing the photopolymerization sensitizer is less.
A photopolymerization sensitizer composition characterized by comprising a photopolymerization sensitizer containing an alkoxyanthracene compound represented by the formula (1) and a singlet oxygen quencher; and a photopolymerizable composition containing the photopolymerization sensitizer composition:
in the formula (1), n represents an integer of 1 or 2; R represents a C1-12 alkyl group; and X represents a hydrogen atom or a C1-8 alkyl group.
作者:Friedrichsen, Willy、Roehe, Meike、Debaerdemaeker, Tony
DOI:——
日期:——
THE DIENE SYNTHESIS WITH β-NITROSTYRENE
作者:C. F. H. ALLEN、A. BELL、J. W. GATES
DOI:10.1021/jo01192a011
日期:1943.7
Photophysical, Electrochemical, and Electrogenerated Chemiluminescent Properties of 9,10-Dimethyl-7,12-diphenylbenzo[<i>k</i>]fluoranthene and 9,10-Dimethylsulfone-7,12-diphenylbenzo[<i>k</i>]fluoranthene
作者:Eve F. Fabrizio、Andrew Payne、Neil E. Westlund、Allen J. Bard、Philip P. Magnus
DOI:10.1021/jp012012s
日期:2002.3.1
A newly synthesized light emitting compound 9,10-dimethylsulfone-7,12-diphenylbenzo[k]fluoranthene (DSDPBF) and its synthetic intermediate 9, 10-dimethyl-7,12-diphenylbenzo[k] fluoranthene (DMDPBF) were studied to evaluate how the addition of weak electron donating methyl groups and the subsequent addition of an electron withdrawing sulfone group affect the photophysical and electrochemical properties as well as the rate of radical cation coupling of the parent compound, 7,12-diphenylbenzo[k]fluoranthene (DPBF). Although the photochemical and electrochemical properties of DSDPBF were more similar to the unsubstituted DPBF than to the DMDPBF, there was a substantial decrease in the quantum efficiency upon addition of the electron-rich sulfone group which was not observed upon addition of the methyl groups. On the other hand, the rate of radical cation coupling or dimerization observed upon electrochemical oxidation varied significantly. The addition of the electron donating methyl groups decreased the reactivity of the radical cation resulting in a 40 times slower rate of dimerization than that observed for the unsubstituted benzo[k]fluoranthene, whereas the addition of the electron withdrawing sulfone group to the methyl groups increased the radical cation reactivity resulting in a rate of dimerization that was 3 times faster than the unsubstituted parent compound. As a result, the electrogenerated chemiluininescence emission spectrum obtained from the annihilation reaction between the radical anion and radical cations of DSDPBF was dominated by emission from the dimer at 589 and 621 nm instead of emission from the monomer at ca. 485 nm.