Porphyrin metal–organic frameworks with bilayer and pillar-layered frameworks and third-order nonlinear optical properties

Abstract

It is recognized that dimensions have a decisive influence on the properties of materials. Metal-organic frameworks as third-order nonlinear optical (NLO) materials have attracted much attention recently. However, the research...

A Multistimuli-Responsive Cd-MOF Constructed by an Extended Viologen-Based Carboxylate Ligand

“…The excellent and reversible photochromic properties of Cd-MOF- 1 inspired us to investigate its application in ink-free erasable printing. − Unlike some reported cases of ink-free erasable printing using filter paper as a substrate, we attempted to mix Cd-MOF- 1 with polydimethicone (PDMS) to prepare an ink-free erasable printing Cd-MOF- 1 @PDMS film. − The printing process is shown in Figure a. The template is covered on the film to control the incident area of light so as to realize the printing of the target pattern.…”

Ingenious Modulation of Third-Order Nonlinear Optical Response of Zr-MOFs through Defect Engineering Based on a Mixed-Linker Strategy

“…The diffuse reflection spectrum of UV–vis (Figure S12) reveals a distinct absorption peak at the wavelength of 420 nm and four weak peaks in 500–700 nm, which correspond to the Soret band and Q-band of the porphyrin ring in TCPP/UiO-66 . The incorporation of TCPP with optical advantages into the framework of UiO-66 significantly enhances the visible light absorption capacity of the UiO-66.…”

“…The diffuse reflection spectrum of UV−vis (Figure S12) reveals a distinct absorption peak at the wavelength of 420 nm and four weak peaks in 500−700 nm, which correspond to the Soret band and Q-band of the porphyrin ring in TCPP/UiO-66. 19 The incorporation of TCPP with optical advantages into the framework of UiO-66 significantly enhances the visible light absorption capacity of the UiO-66. The experimental results exhibit a remarkable improvement in the NLO signal of TCPP/UiO-66, as evidenced by the β eff value achieving approximately 4−10 times compared to that observed for the pristine UiO-66.…”

“…Third-order nonlinear optical (NLO) materials have been widely used in laser protection, biological imaging, photodynamic therapy, and logic devices. − Metal–organic frameworks (MOFs) exhibit exceptional potential for applications in the field of nonlinear optics owing to their customizable structure, adjustable electronic properties, and facile modifiability. − Currently, primitive MOFs are limited to a single charge transfer path either from metal to ligand or from ligand to metal, resulting in low efficiency of electron transfer. , Defect tuning in MOFs is an effective approach to address this issue. It is widely embraced to promote the properties of diverse materials, regulate their surface characteristics, and bestow novel and practical functionalities upon them. , The introduction of defects into MOFs can not only lead to a cascade of transformations, including the rupture and recombination of chemical bonds and distortion and rearrangement of electron clouds, but also engender new pathways for charge transfer, thereby effectively augmenting charge transfer efficiency. − The charge transfer efficiency is widely acknowledged as the pivotal factor influencing the performance of NLO, which possesses the potential to effectively regulate and optimize the overall functionality. − …”

Enhanced hydrolytic stability and photocatalytic performance of a uranium‐based organic framework by hybrid carbon nanotubes

“…Metal–organic frameworks (MOFs), also known as porous coordination polymers, represent a novel class of crystalline porous materials, formed by coupling metal ions or clusters with organic ligands, leading to framework structures with unique properties 1–6 . MOFs, characterized by their high porosity, low density, large specific surface area, tunable pore sizes, and diverse topologies, have found extensive applications in various fields, including sensing, 7 nonlinear optical, 8 batteries, 9 supercapacitors, 10 catalysis, 11,12 gas storage and separation, 13 and drug delivery 14 . Despite their usefulness, MOFs are hampered by their low chemical and hydrolytic stability, which is particularly pronounced in porous MOFs with a high pore size or surface area 15 .…”