Synthesis, Structure, and Optical‐response Magnetic Property of a Heteroarene‐azo Functionalized Mn₁₉ Cluster

Abstract

Comprehensive Summary Metal clusters with photoswitching ligands can undergo magnetic changes under light radiation, which makes them potential optical‐response magnetic‐switching materials. Herein, a photoswitchable Mn‐oxo cluster [MnII15MnIII4(L)18(OH)12(N3)6] (ClO4)2 (C6H5CN)8, (Mn19azo, HL=1‐(hydroxymethyl)‐3,5‐dimethyl‐4‐(phenyldiazenyl)‐pyrazole) has been designed and synthesized to realize the photoswitching behavior. Mn19azo shows quick trans‐to‐cis transformation upon 365 nm light irradiation in CH2Cl2 solution and solid state as confirmed by UV‐Vis spectra. After the powder sample was irradiated for 80 min, the Curie constant of Mn19azo increases by about 7%. The change of magnetic properties can be considered as the result of the change of intermolecular interactions.

Two Octa-Nuclear {Ln8} (Ln = Tb, Dy) Complexes with “4 + 4” Covalent Organic Macrocycles: Structure, Solution Behavior, Luminescence, and Magnetic Properties

“…Our recent studies mainly focused on the assembly process, luminescence response properties, and molecule magnet of these lanthanide covalent organic macrocycles. − A common method for constructing lanthanide covalent organic macrocycles is the use of covalent organic macrocycle ligands that can react with metal ions . To propose a more detailed assembly mechanism, we constructed lanthanide covalent organic macrocycle covalent/coordination dual-driven from some self-assembled inorganic/organic species, which connected each other to rings. , The assembled intermediates can be identified with high-resolution electrospray ionization mass spectrometry (HRESI-MS) to clarify the stepwise assembly process between organic subcomponents and metal templates. − …”

Mixed‐Valence Manganese Carboxylate Clusters, {MnIII6MnII4}, {MnIII7MnII5Na}, and {MnIII7MnII5}, Derived from the Combined Use of Di‐2‐pyridyl Ketone with Selected Aliphatic Diols

“…[17] In addition to their classical characteristics, SMMs can also exhibit quantum properties such as quantum tunneling of magnetization (QTM) [18,19] and quantum phase interference, and they have thus been proposed for a variety of potential technological applications, including molecular spintronics and quantum computation. [20][21][22] We, and others, have had a continuing interest in the development of new synthetic strategies for the isolation of Mn clusters possessing high nuclearities, [23][24][25] novel structural characteristics [26][27][28] and interesting magnetic properties. [29][30][31] To this end, various organic chelating/bridging ligands with diverse functionalities have been utilized, such as (poly)alcohols [32][33][34][35] or oximates.…”

A dual‐responsive luminescent sensor for efficient detection of 3‐nitrotyrosine and dipicolinic acid biomarkers based on copper(II) organic framework

“…Benefiting from the highly ordered arrangement of organic linkers and inorganic blocks, metal–organic frameworks (MOFs) were endowed with the structural features of adjustable architecture, readily modifiable confined space, and large surface area 13–21 . These unique characteristics promoted MOFs vast applicability as chemosensors in detecting water‐soluble toxic ions or cations, volatile organic compounds, and nitroaromatic explosives 22–30 . Recently, Biswas's group developed a fluorophore‐anchored metal–organic framework (MOF) using a hybrid ligand approach, and subsequently assessed its luminescent sensing capabilities for detecting 3‐nitrotyrosine (3‐NT) in HEPES solutions 31 .…”