Combining Ti4(embonate)6 Anionic Cage and π-Conjugated Coordination Cation for Highly Effective Optical Limiting

Abstract

The integration of anionic Ti4L6 (L = embonate) cages and π-conjugated coordination cations into ordered structures can produce high-performance nonlinear optical (NLO) materials. More specifically, by employing the Ti4L6 cages to assembly with mixed N, N-chelated and P, P-chelated type conjugated organic ligands and Ag+ ions, three cage-based structures have been synthesized and structurally characterized. Among them, an ion pair structure with strong π-π accumulation exhibits a significant third-order NLO response, and an excellent optical limiting effect has been experimentally verified.