Article
Chemistry, Inorganic & Nuclear
Sandugash Yergeshbayeva, Jeremy J. Hrudka, Minyoung Jo, Miguel Gakiya-Teruya, Mark W. Meisel, Michael Shatruk
Summary: A heteroleptic spin-crossover complex [Fe(tpma)(xnap-bim)](ClO4)(2) has been synthesized, and depending on the crystallization conditions, two solvates have been obtained. The crystalline structures of both solvates and the solvent-free structure show the formation of double columns of [Fe(tpma)(xnap-bim)](2+) cations through efficient pi-pi interactions. While both solvates exhibit gradual spin-crossover, the solvent-free complex shows an abrupt spin transition and light-induced excited spin state trapping effect.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Igor Nikovskiy, Dmitry Yu. Aleshin, Valentin V. Novikov, Alexander V. Polezhaev, Ekaterina A. Khakina, Elizaveta K. Melnikova, Yulia V. Nelyubina
Summary: A new synthetic pathway is developed to produce previously elusive heteroleptic iron(II) complexes that stabilize the opposite spin states of the metal ion. These complexes have important implications for practical applications in sensing, switching, and multifunctional devices.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Raul Diaz-Torres, Silvia Gomez-Coca, Eliseo Ruiz, Phimphaka Harding, David J. Harding
Summary: A family of heteroleptic spin crossover (SCO) complexes have been synthesized, and their spin transition properties vary with temperature. The magnetic properties of these complexes are significantly improved by slight changes in crystal packing, which enhance the cooperativity.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Sriram Sundaresan, Jens-Georg Becker, Julian Eppelsheimer, Alexander E. Sedykh, Luca M. Carrella, Klaus Mueller-Buschbaum, Eva Rentschler
Summary: A new nitro-oxidative ligand was synthesized and complexes with iron and zinc were formed. The spin transition of the iron complex was analyzed by X-ray crystallography and magnetic susceptibility measurements. Solid-state luminescence studies provided preliminary evidence of the interplay of luminescence and spin transition in the iron complex.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Alexander R. Craze, Hikaru Zenno, Michael C. Pfrunder, John C. McMurtrie, Shinya Hayami, Jack K. Clegg, Feng Li
Summary: This study investigates the interaction between crystal packing, intermolecular interactions, and the magnetic behavior of SCO materials. The research found that a more separated array of SCO units leads to more extensive spin-transitions, while a tightly arranged lattice environment stabilizes the low-spin state.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Tobias Paschelke, Eicke Trumpf, David Grantz, Malte Pankau, Niclas Grocholski, Christian Naether, Frank D. Soennichsen, Anna J. Mcconnell
Summary: In this study, a family of (Fe4L6)-L-II spin-crossover cages based on 2,2'-pyridylbenzimidazoles was reported, and it was found that subtle ligand modifications can lower the spin crossover temperature in CD3CN by up to 186 K. Comparing different pairs of cages, it was observed that CH3 substituents on either the coordination motif or phenylene linker can lower the spin-crossover temperature by different degrees, attributed to electronic effects, steric effects, and a combination of both. The understanding of the interplay between ligand modifications from this study could contribute to the improved rational design of spin-crossover cages.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Sahidul Mondal, Koushik Sarkar, Pradyut Ghosh
Summary: A series of new bis-heteroleptic Ru(II) probes were used in a comparative study for the selective detection of H2PO4-, with 1[PF6](2) and 7[PF6](2) found to be superior in terms of MLCT-M-3 emission enhancement, binding constant, and detection limit, possibly due to better supramolecular aggregation properties.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Shu-Ya Zhang, Hui-Ying Sun, Run-Guo Wang, Yin-Shan Meng, Tao Liu, Yuan-Yuan Zhu
Summary: The self-assembly of multinuclear SCO complexes is appealing for the discovery of unique properties. In this work, three dinuclear cobalt(II) complexes were prepared using a complementary terpyridine ligand pair strategy. The complexes show different spin crossover behaviors and demonstrate the practicality of the complementary terpyridine ligand pairing in constructing multinuclear SCO-active compounds.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Vyshnavi Vennelakanti, Michael G. Taylor, Aditya Nandy, Chenru Duan, Heather J. Kulik
Summary: In this study, the electronic and Gibbs free energies associated with spin crossover in 95 Fe(II) SCO complexes were investigated using density functional theory (DFT) with 30 different functionals. It was found that a modified version of B3LYP, M06-L, and TPSSh functionals accurately predict the spin crossover behavior of most complexes, while the MN15-L functional fails to predict any spin crossover behavior.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Yizhen Chen, Mengyuan Wu, Dongmin Wang, Ningning Yuan, Gengwen Tan, Lei Xu
Summary: The synthesis and characterization of an isolable heteroleptic diarylphosphinyl radical is reported. The spin density mainly resides at the phosphorus center, revealing its phosphorus-centered radical nature. Reactivity studies show its ability to form diarylchlorophosphine and diarylphosphine, confirming its radical behavior centered on phosphorus.
Review
Chemistry, Inorganic & Nuclear
Ke Sun, Jin-Peng Xue, Zi-Shuo Yao, Jun Tao
Summary: In this perspective, we briefly review the main synthetic strategies and progresses in fluorescent spin-crossover (SCO) materials in the last twenty years, emphasizing the promising applications of fluorescent SCO bifunctional materials in magneto-optical switching and information processing.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Kai Yan Shen, Chen Ju Zhang, Lei Yu Qu, Shi Qing Jiang, Yi Zhang, Ming Liang Tong, Xin Bao
Summary: This study successfully manipulated the spin states of two iron(II) complexes based on pyridylacylhydrazone ligands and demonstrated different ways of spin state switching. 2-Fe showed thermoinduced spin-crossover above room temperature with a very large and reproducible hysteresis, while 1-Fe remained in the low-spin state above 400 K.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Bijoy Dey, Sakshi Mehta, Abhishake Mondal, Jordi Cirera, Enrique Colacio, Vadapalli Chandrasekhar
Summary: This study explores the impact of electron-donating and electron-withdrawing substituents on the spin crossover behavior of Fe(III) complexes based on SalEen ligands. Experimental and theoretical methods are used to determine that an electron-donating substituent leads to a lower transition temperature, while an electron-withdrawing substituent leads to a higher transition temperature. UV-vis spectra analysis and theoretical studies provide insights into the reasons behind this behavior.
Article
Biochemistry & Molecular Biology
Giacomo Picci, Jessica Milia, Maria Carla Aragoni, Massimiliano Arca, Simon J. Coles, Alessandra Garau, Vito Lippolis, Riccardo Montis, James B. Orton, Claudia Caltagirone
Summary: The newly designed H2L molecule selectively binds Cl- and Cu2+, forming a green-emitting metal-receptor complex, and its emission properties remain unaffected in the presence of Cl-.
Review
Biochemistry & Molecular Biology
Dawit Tesfaye, Wolfgang Linert, Mamo Gebrezgiabher, Yosef Bayeh, Fikre Elemo, Taju Sani, Nandakumar Kalarikkal, Madhu Thomas
Summary: Supramolecular architectures formed by combining inorganic metal cations and organic ligands through self-assembly are a technique in modern chemical science. These multi-nuclear systems have various applications including sensing, storage/cargo, display, and molecular switching. Iron(II) mediated spin-crossover (SCO) supramolecular architectures with Schiff base ligands have gained attention due to their unique structures and potential applications. This review article discusses the various geometrical possibilities and the structural and SCO behavior of these complexes.