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Cheng et al. Chem Synth 2023;3:13 https://dx.doi.org/10.20517/cs.2022.43 Page 3 of 13

Scheme 1. Molecular structures of the platinum(II) complexes (1 and 2) and the platinum(II)-containing conjugated polymers (3-5).

The synthetic routes for the conjugated polymers are depicted in Supplementary Scheme 2. Detailed
syntheses of the bromo-containing conjugated polymers, poly[fluorene(C H Br) -co-fluorene(C H ) ]
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6
13 2
2
12
(PF-Br), poly[fluorene(C H Br) -co-phenylene](PFP-Br) and poly[fluorene(C H Br) -co-thiophene(C H )]
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13
6
6
6
12
2
2
(PFT-Br), and the corresponding azido-containing conjugated polymers (PF-N , PFP-N and PFT-N ) are
3
3
3
shown in pp S11-S14, Supplementary Materials. All the organic conjugated polymers were found to have
good solubility in organic solvents such as chlorinated solvents, toluene, THF, and others. The identities of
all of the organic conjugated polymers have been confirmed by H NMR spectroscopy and GPC analysis.
1
The synthetic routes for the platinum(II)-containing conjugated polymers are depicted in Supplementary
Scheme 3. The platinum(II)-containing conjugated polymers 3-5 were also obtained through copper(I)-
catalyzed alkyne-azide cycloaddition of the corresponding azido-containing conjugated polymers and 1 in
THF-DMF mixture in the presence of ammonium triflate (pp S15-S17, Supplementary Materials). The
products were purified by precipitation in deionized water containing ammonium triflate. The
platinum(II)-containing conjugated polymers were found to have fair solubility in acetonitrile, DMF and
DMSO. Their limited solubility in methanol and THF has facilitated the purification by washing the
precipitate with methanol and THF to further remove any unreacted starting materials.
Characterization
All the newly synthesized platinum(II) complexes 1 and 2 and platinum(II)-containing polymers 3-5 have
been characterized by H NMR and IR spectroscopy. In addition, 1 and 2 were also confirmed by positive-
1
ion FAB mass spectrometry and showed satisfactory results in the elemental analyses. 3-5 were also
confirmed by GPC analysis using DMF with 0.1 M KPF as eluent. Representative GPC data of 5 is provided
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in Supplementary Figure 1.