Design of New Borates with Deep Ultraviolet Transparency Inspired by the Flexibility of Unusual Triple-Layered Frameworks

Abstract

Borates with a layered framework are promising and charming in linear and nonlinear optics. In this study, the flexibility of an unusual triple-layered B−O framework was explored systemically. It was found that the framework is flexible enough to accommodate diverse alkali metal cations, making it steerable to regular unit arrangement and optical properties. Accordingly, a new borate K 11 NaB 28 O 48 , which displays a deep ultraviolet cutoff edge (<190 nm), was designed and synthesized by the method of a high-temperature solution. Moreover, Na 3 B 7 O 12 and K 3 B 7 O 12 with a triple-layered framework were designed through theoretical prediction, proving the flexibility of the framework and the regulatory effect of cations. This work presents a feasible strategy for exploring optical materials based on the flexibility of a layered framework.

Manganese-Based Halogen Regulation Enhances Photoluminescence Efficiency Engineering

“…Compared to other transition metal ions Zn 2+ and Cu 2+ , Mn-based organic–inorganic hybrid halides not only have the advantage of low raw material cost but also exhibit a unique tunable luminescent color, making them an emerging material with fascinating optical, electronic, mechanical, and other properties. − By selecting appropriate organic and inorganic components, three-dimensional (3D), two-dimensional (2D), one-dimensional (1D), and zero-dimensional (0D) structures can be obtained. Compared to high-dimensional materials, low-dimensional (0D/1D) hybrids have a higher exciton binding energy and generation energy, thus exhibiting excellent luminescence efficiency and stability. − Generally, tetrahedral-coordinated Mn 2+ emits green light, while octahedral-coordinated Mn 2+ emits red light. , As an example, Chen et al reported that the 0D Mn-based hybrid (PPh 4 ) 2 MnBr 4 displays efficient green emission and successfully prepared organic light-emitting diodes, indicating outstanding electroluminescent properties of the material .…”

Reversible Phase Transition and Dielectric Response of Hybrid Lead-Free Antimony-Based Crystals

“…Recently, there has been a notable increase in interest regarding organic–inorganic hybrid phase transition materials. The intriguing thermodynamic and kinetic properties of these hybrid compounds, coupled with their diverse structures, bestow upon them a range of fascinating physical phenomena and characteristics. − Consequently, numerous research fields have dedicated their efforts to exploring these materials in the pursuit of exciting discoveries and novel features. Moreover, organic–inorganic hybrid halide counterparts have captured equal attention due to their versatility, solution-processability, and structural tunability. − These compounds have showcased an outstanding performance in various areas such as dielectric, ferroelectric, piezoelectric, photoluminescent, thermochromic, and nonlinear optics. − Importantly, the properties of phase transition materials are closely tied to their molecular structure.…”

High-Symmetry Structural Phase Transition Triggers a Triple Switch Based on Dielectric, Nonlinear Optics, and Photoluminescence

“…Simple physical response sometimes cannot express the characteristic requirements of a device. Therefore, multifunctional composites are one of the strategies of material design to meet the requirement. − Multifunctional responses, integrating multiple physical channels into a single device such as optical and electric properties, have gained widespread attention and have tremendous development potential to miniaturize and integrate electric devices. − In order to achieve multifunctional responsive materials with excellent performance, the relationship between the intrinsic structure and physical/chemical properties has been continuously explored. − Composites with ideal multifunctional responses, especially dielectric switchable materials with other physical properties such as photoluminescence, − nonlinear optical properties, − and semiconductor properties, − can have wide applications.…”