Synthesis and Optical Properties of Triphenylene-Based Donor-Donor and Donor-Acceptor Conjugated Polymers: A Comparative Study

Table 1

Absorption maxima of P1 and P2 as dilute solutions in different solvents.

Polymer	(nm)
	Hexane (1.9)	p-Xylene (2.268)	Benzene (2.27)	Toluene (2.38)	Anisole (4.33)	CHCl3 (4.81)	THF (7.58)	ODCB (9.93)	DMF (36.7)	DMSO (46.7)
P1	440	440	438	440	442	436	438	440	442^b	458^b
P2	468^a	476	474	478	476	474	472	482	472^b	486^b

^aP2 has poor solubility in hexane, and the upper, clear portion of a saturated P2 solution in hexane was collected and used for measurement. ^bDue to the very poor solubility of P1 and P2 in DMF and the insolubility of P1 and P2 in DMSO, these solutions were prepared by adding a very small amount of concentrated CHCl₃ stock solution of P1 or P2 to respective solvents. The numbers in brackets are the dielectric constants of the solvents.