A series of multifunctional coordination polymers based on terpyridine and zinc halide: second-harmonic generation and two-photon absorption properties and intracellular imaging

Abstract

Nonlinear optical CPs with good one- and two-photon excited fluorescence and SHG properties are presented.

ZnII Complexes for Bioimaging and Correlated Applications

“…λ ex : 840 nm, Scale bar=10 mm. [Adapted from and reproduced by permission of The Royal Society of Chemistry].…”

“…[45] Recently,T ian et al developed as eries of terpyridine-Zn coordination polymers (7-1, 2, 3)w ith very good photoluminescences ignal, thermal stability, two-photon excited fluorescence ands econd harmonic generation. [46] Amongst this series, complex 7-1 has been applied for two-photon ands econd harmonic generation, SHG, imaging, displaying good penetration and uniform intercellular cytosolic distribution,i nt he free form, in both one-photon and two-photon channels and negligible SHG emission ( Figure 1a). Conversely when the complex 7-1 was encapsulatedb ym PEG2000(polyethyleneg lycol)-PLA2000(polylactic acid) in hydrophobic condition, as trong SHG signal was observed ( Figure 1b).…”

“…To further investigate the application of such complexes in living systems, complex 9 was designated as at wo-photon fluorescent probe for cellular lipid membranes.T he imaging results of complex 9 presented that the cells showeds trong fluorescences ignal both in one-and two-photonchannels (Figure2A). In addition, the merge between the one-photon fluorescencea nd two- [46] and reproduced by permission of The RoyalS ocietyofC hemistry].…”

Controllable synthesis and spontaneous phase transition of photonic coordination polymer to produce a strong second-harmonic generation response

“…Understanding such an exceptional phase transition and utilizing it to achieve a new type of NLO switch that activates SHG by heating are meaningful. In contrast to the inorganic NLO materials, the organic-inorganic hybrid materials with NLO properties are seldom reported [20,21]. Also, their further applications are limited due to their weak thermal stability.…”

“…Moreover, CPs can possess various structures through the alteration of organic linkers and the coordination styles of metal atoms, allowing for the ability to conveniently tune the properties of CPs. For example, the Vtype p-dipyridine derivatives [20,25] can be coordinated with zinc ions to form noncentrosymmetric complexes through structural distortion. Altering organic linkers and metal atoms is a good approach to controllably synthesize and tune the structures of CPs using AIEgen ligands for maintaining the original properties of organics; however, they are still challenging for current researchers.…”