Ligand evolution on trigonal bipyramidal boron imidazolate cages for enhanced optical limiting

Abstract

Low-symmetry metal-organic cages (MOCs) have received increasing attentions due to their complex structures and more advanced functions. Here, we report a new MOC cage with unique trigonal bipyramidal configuration, [M5L6],...

Optical limiting effects of 1,10-phenanthroline functionalized heterometallic Sn–Ti oxo clusters with distinct π⋯π interactions

“…The optical limiting effect can be typically influenced by multiple factors. 45,46 In this study, we believed that the OL performance of compounds was dependent on the strength of π⋯π interactions and the magnitude of optical gaps. On the one hand, the intramolecular π⋯π interactions and intermolecular π⋯π interactions exert a direct influence on the optical response of materials.…”

“…On the one hand, the intramolecular π⋯π interactions and intermolecular π⋯π interactions exert a direct influence on the optical response of materials. 35,45 On the other hand, the optical gap plays a crucial role in the NLO response, and heterometallic Sn–Ti oxo clusters with narrower optical gaps exhibit positive effects in improving the OL performance. 17 TOC-62 has the smallest optical gap value of 1.95 eV and exhibits the most abundant π⋯π interactions among the three compounds, so it displays the lowest minimum normalized transmittance ( T min = 0.35), the highest nonlinear absorption coefficient ( β = 4.19 × 10 −9 m W −1 ), and the smallest optical limit threshold ( F OL = 0.42 J cm −2 ).…”

Intramolecular charge transfer enhanced optical limiting in novel hydrazone derivatives with a D1–D–Ai–π–A structure

“…Therefore, optical limiting materials based on the mechanism of reverse saturable absorption (RSA) have attracted great attention because their absorption coefficients increase with the increase of incident light intensity. [12][13][14] Multiphoton absorption induced ESA (MPA-ESA) is an appealing method to achieve RSA. 15,16 In this process, the molecule will only be excited to the excited state through multiple photon absorption under a high-power super-pulse laser, then absorbs one more photon to reach the higher excited state.…”

Fabrication of Two-Dimensional Homo-Bimetallic Porphyrin Framework Thin Films for Optimizing Nonlinear Optical Limiting

“…Nonlinear optical (NLO) materials are currently the focus of intensive research efforts, which possess great potential applications in many fields, such as optical data storage, Q-switching, mode-locking, optical limiting (OL), and so on. − Among them, OL materials can be used to protect eyes and sensitive optical instruments from laser-induced damage. Research progress in this area depends critically on the development of new materials with powerful NLO capabilities and application value.…”