Boron- and silicon-containing conjugated homo- and copolymers could be synthesized using acyclic diene metathesis (ADMET) condensation of bis-styryl monomers. Both, tri-and tetra-coordinated boron monomers were successfully polymerized forming homopolymers, or random copolymers (if polymerized together with a silicon containing co-monomer). Polymer molecular weights M-n were measured at approximate to 6000 to 15,000 g/mol (NMR end group analysis) with molecular weight distributions M-w/M-n approximate to 1.8 to 2.2. The polymers absorbed at (max) approximate to 317 to 406 nm and emitted at (max) approximate to 370 to 494 nm with fluorescent quantum efficiencies approximate to 24 to 48%. The copolymer with tri-coordinate boron showed highly efficient fluorescence quenching in the presence of fluoride ions at ratios boron/fluoride approximate to 5/1, demonstrating its potential as anion sensor. (c) 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 1707-1718