. . . . "In accordance with the purpose of the present invention, as embodied and broadly described herein, the present invention relates to a modified particle which includes a particle having an attached group having the formula: ##STR4## wherein Ar represents an aromatic group; R1 represents a bond, an arylene group, an alkylene group, ##STR5## wherein R4 is an alkyl or alkylene group or an aryl or aryl" . .