. Author manuscript; available in PMC: 2013 Oct 3.

Published in final edited form as: J Am Chem Soc. 2012 Sep 21;134(39):16255–16264. doi: 10.1021/ja305900r

Table 1.

Polymer Characterization

	M_n(theo) (kDa)	M_n(NMR)^a (kDa)	M_n(GPC)^b (kDa)	M_w(GPC)^b (kDa)	PDI^c	DP_theo	DP_NMR^a	DP_GPC^b	[α]_D (CH₂Cl₂)
P1’	11.9	11.0	9.5	10.5	1.1	26	24	21	79.1
P2’	23.0	27.5	16.7	19.0	1.1	50	60	36	80.5
P3’	91.8	82.6	56.2	64.5	1.1	200	180	122	83.3

	M_n(theo) (kDa)	M_n(NMR)^d (kDa)	Radius^e (nm)	M_w(DLS)^f (kDa)	%PD^f	DP_theo	DP_NMR	DP_DLS	[α]_D (H₂O)

P1	4.7	5.7	1.6± 0.4	5.0	26	26	30^f	26	129
P2	9.5	8.9	>50^g	n.d.	n.d.	50	47^f	n.d.	n.d.
P3	37.8	n.d.	>50^g	n.d.	n.d.	200	n.d.	n.d.	n.d.

Determined by integration of the ¹H-NMR signal from the t-butyl group on the initiator.

THF GPC with polystyrene standards.

M_w/M_n.

Determined by integrating t-butyl groups of reduced t-butyl benzamide end group.

Determined by dynamic light scattering, T = 50 °C (average of 30 measurements).

Based on model for linear polysaccharides, %PD = percent polydispersity.

The large radius is indicative of aggregates in solution. n.d. = not determined.