申请人:Tong Yuhua
公开号:US20120189347A1
公开(公告)日:2012-07-26
A compound of the formula
wherein R
1
, R
2
, R
3
, and R
4
can be the same or different, and wherein each of R
1
, R
2
, R
3
, and R
4
are independently selected from (i) hydrogen, (ii) an alkyl group, (iii) an aryl group, (iv) an arylalkyl group, (v) an alkylaryl group, (vi) an alkoxy group, (vii) an aryloxy group, (viii) an arylalkyloxy group, (ix) an alkylaryloxy group; and wherein R
5
is (i) an alkylene group, (ii) an arylene group, which can be substituted or unsubstituted arylene, and wherein hetero atoms may optionally be present in the arylene group, (iii) an arylalkylene group, or (iv) an alkylarylene group. Further, a process for preparing a charge transport compound comprises contacting a hydroxy-functionalized triarylamine with a dihalide in an alkaline-water solution at room temperature; wherein the raw material for the dihalide comprises a purified or recovered halogen-organic solvent-containing waste stream.