Modulating anthracene excimer through guest engineering in two-dimensional lead bromide hybrids

Abstract

A full understanding of the excimer formation and structure-property relationship is essential to their development in organic electronics. Herein, we propose a template strategy for finely modulating the stacking configuration...

Photocycloaddition of Zero-Dimensional Metal Halide Hybrids with Reversible Photochromism

“…To understand the photocycloaddition behavior, the alignments of L cations are shown in Figure 1d,e. An average distance of 3.669 Å is found for pyridine and pyrrole ring, indicating the presence of π−π stacking interaction between L. 37 The average distance of olefin bonds is ∼3.481 Å (Figure 1d) for antiparallel-packed L cations in 1, implying the possibility of photocycloaddition. 55 In comparison, 2 shows three kinds of head-to-tail alignment modes for L (Figure 1e).…”

“…As a kind of ionic compound, metal halide hybrids (MHHs) mainly consist of organic cations and metal halide polyhedra anions. Due to their wide composition and structure tunability, easy preparation, and excellent optical properties, MHHs have been attracted enormous attention in optoelectronic fields including X-ray scintillator, − solid-state lighting, − anticounterfeiting, − information encryption, and stimulus response. , Recently, [2 + 2] photocycloaddition was successfully employed to control the room-temperature phosphorescence switch and photochromism in zero-dimensional (0D) bibased MHHs . Endowing MHHs with reversible photochromism could significantly broaden their applications in fields such as high-level-security information encryption and optical data storage.…”

Long-Persistent High-Temperature Phosphorescence of Zero-Dimensional Metal Halide Hybrid for Temperature-Sensitive Anticounterfeiting

“…Constructing low-dimensional metal halide hybrids (MHHs) seems an effective approach to enhance the RTP performance of organic phosphors. ,,− Due to the multiple Coulombic and hydrogen-bonding interactions between organic phosphors and metal halide polyhedra, − positively charged organic phosphors are fixed in a relatively rigid and compact structural environment that suppresses nonradiative transitions caused by thermal vibration and undesirable oxygen quencher. , Therefore, various host materials including crystalline metal–organic framework, amorphous polymers, ,, and supramolecular cages , have been employed to incorporate organic phosphors to enhance the performance of RTP. Although the detrimental effects from humidity and oxygen quencher could be physically shielded through the host–guest strategy, the thermal quenching effect is hardly overcome, especially for temperatures above 373 K, which most optoelectronic fields demand.…”

Efficient triplet energy transfer in a 0D metal halide hybrid with long persistence room temperature phosphorescence for time-resolved anti-counterfeiting

“…31 Therefore, there has been strong interest in developing new organic cations with unique optical characteristics and enhanced interaction with inorganic emissive centers to improve the optical properties of MHHs for different applications. 32–34…”