Poly(pyridinium salt)s with organic counterions derived from 3,3′-dimethylnaphthidine:
Thermal, liquid crystalline, and optical properties
Robin Jose, a* Dat Truong, a,1 Haesook Han, b and Pradip K. Bhowmik b a
Department of Natural Sciences, University of Houston-Downtown, One Main Street, Houston,
TX 77002-1001, USA., b
Department of Chemistry and Biochemistry, University of Nevada Las
Vegas, 4505 Maryland Parkway, Box 454003, Las Vegas, NV 89154-4003, USA.
* Correspondence to: Robin Jose (E-mail: Joser@uhd.edu
); Ph:+1 713-221-8115; Fax: +1713-
223-7476.
Fig. S1 FTIR spectrum of monomer 2 (film)
1
1 Department of Biochemistry and Biophysics
Texas A&M University
College of Agriculture and Life Sciences
2128 TAMU, College Station, TX 77843-2128
1

Fig. S2
1
H NMR spectrum of monomer 2 obtained in DMSOd
6
2

Fig. S3 13 C NMR spectrum of monomer 2 obtained in DMSOd
6
3

Fig S4 IR spectrum of polymer I (neat film cast from methanol)
4

Fig. S5 IR spectrum of polymer II (neat film cast from methanol)
5

Fig. S6 IR spectrum of polymer III (neat film cast from methanol)
6

Fig. S7 IR spectrum of polymer IV (neat film cast from methanol)
7

Fig. S8
1
H NMR spectrum of Polymer I obtained in DMSOd
6
8

Fig. S9 1 H NMR spectrum of Polymer II obtained in DMSOd
6
9

Fig. S10
1
H NMR spectrum of Polymer III obtained in DMSOd
6
10

Fig. S11
1
H NMR spectrum of Polymer IV obtained in DMSOd
6
11

Table S1. Molecular weights of poly(pyridinium salt)s containing 3,3′-dimethylnaphthidine moieties and organic counterions.
Polymer M n a
M w b
PDI c dn/dc (mL/g) R h
(nm) d
R g
(nm) e
I
II
56 74 1.32 0.0727
76
69
83
91
1.09
1.31
0.0940
0.0638 III
IV 56 72 1.30 a
Number-average molecular weight in kg/mol b
Weight-average molecular weight in kg/mol c Polydispersity index (M w
/M n
) d
Hydrodynamic radius e
Radius of gyration.
0.0746
10.2
10.8
11.0
10.2
13.4
14.1
14.3
13.3
12

Fig. S12 DSC thermograms of polymers I – IV in the second cooling cycles at the rate of 10
°C/min, under nitrogen
13

Fig. S13 UV-Vis spectra of polymers IIV obtained in acetonitrile
Fig. S14 UV-Vis spectra of polymers IIV obtained in methanol
14

Table S2. Fluorescence properties of poly(pyridinium salt)s with various organic counterions.
I II III IV Polymer
PL λ em
(ACN)
572 543 572 543
(nm)
PL λ em
(MeOH) (nm)
PL λ em
(film a
)
(nm)
PL λ em
(film b
)
(nm)
556
511
511 a
Thin film cast from acetonitrile. b Thin film cast from methanol.
556
511
500
556
511
511
556
511
511
15