This　study　presents　the　successful　synthesis　of　two　new　one-dimensional　(1D)　bismuth　heterocyclic-sulfhydryl　coordination　polymers　(CPs),　Bi-DMTD　and　Bi-HPTT,　through　a　solvothermal　approach　with　triphenylbismuth　as　the　bismuth　precursor,　and　2,5-dithiobis　(1,3-thiazole)　(DMTD)　and　2-mercapto-4-(4-pyridyl)　thiazole　(HPTT)　as　ligands.　The　experimental　findings　reveal　that　both　complexes　have　well-defined　crystalline　structures,　strong　visible-light　absorption,　and　high　photocatalytic　activity.　Bi-DMTD　demonstrates　superior　efficiency　in　degrading　rhodamine　B　(RhB),　achieving　99.8　%　degradation　within　60　min,　surpassing　Bi-HPTT.　Further　tests　on　radical　quenching　and　cycling　stability　confirmed　the　robust　photocatalytic　properties　of　Bi-DMTD,　attributed　to　the　enhancement　of　visible-light　absorption　by　Bi–S　bonds　and　the　facilitation　of　charge　carrier　separation　through　interchain　π-π　interactions.　Additionally,　the　favorable　bandgap　of　Bi-DMTD　supports　multiple　degradation　pathways,　promoting　its　catalytic　effectiveness.　These　results　expand　the　structural　diversity　of　Bi-CPs　and　provide　new　insights　for　the　development　of　efficient　and　stable　photocatalysts.　©　2025　Elsevier　Inc.