70 Chapter 4
OOO
O
OOOHOOHOHOHHO OHHOHOOOO
O
OOOH OHOHOHOHOH
HO HOHOOOO
O
OOOHOOHOHOH OHHO HO HO OHOOO
O
OOOH OHOHOHOHOHOHO HOOOO
O
OOOH OHOHOOHOHOHO HOOO
OOO
O
OOOH OHOH OHOH
HO HOOH HOFigure 11aPhoto-oxidation of cellulose at pendant groups
OOO
OOHOH
OHOHHOHOHhv ·O–O·OOO
OOHOH
OHOHHOHOH+O
OHHO OH
O O
OOHHO OH·O·
OOO
OOHOH
OHOHHOHOOOO
OOHOH
OHOHHOHOO–O·OOO
OOHOH
OHOHHOHOO–OH·OHOOO
OOHOH
OHOHHOHOO·Figure 11bRadical photolysis of cellulose