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ChemInform Abstract: Singlet Oxygen in the Photodegradation of Lignin Models.

✍ Scribed by C. CRESTINI; M. D'AURIA

Publisher
John Wiley and Sons
Year
2010
Weight
28 KB
Volume
28
Category
Article
ISSN
0931-7597

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✦ Synopsis

Singlet Oxygen in the Photodegradation of Lignin Models.

-The photochemical behavior of model compounds (I) and (II), resembling the fundamental bonding patterns of lignin, is studied. The softwood-like aryl ethers (Ia), (Ic), and (IIa) and the hardwood-like model (Ib) give under photochemical oxidation with singlet oxygen products derived from a formal Ξ²-C-O cleavage of the substrate. Hardwood-like compound (IIb) shows lower reactivity of the phenoxy part of the molecule toward singlet oxygen and is oxidized at the phenol moiety. This results show that singlet oxygen can be used to obtain the degradation of both hardwood and softwood lignin. -

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