Tuning the magnetic properties of a new family of hybrid mixed metal oxalates having 1D magnetic chains and layers of J aggregates of [DAMS+] producing superior SHG

Selective Guest Inclusion in Oxalate-Based Iron(III) Magnetic Coordination Polymers

“…Porous coordination polymers (PCPs) are excellent candidates for the design and synthesis of new functional materials. − In particular, their fascinating host–guest chemistry − offers endless possibilities concerning the design of multifunctional materials. − Because of their porous character, PCPs have proved to be useful in catalysis, chemical sensing, , and gas storage and separations. − The desired network topology, which undoubtedly influences the final physical properties, can be predesigned by choosing appropriate synthetic routes and suitable metal ions and bridging or ancillary ligands. In this respect, simply focusing on the vast possibilities offered by the evergreen oxalate ligand, a seemingly infinite number of multifunctional materials have been synthesized. , In these compounds, the anionic networks of general formula [M I/II M III (ox) 3 ] 2–/– (M = Cr, Fe and ox = oxalate) act as hosts of a great variety of either organic or inorganic cations as well as cationic metal complexes to afford hybrid compounds. − The long-range magnetic ordering occurring in some of them, which is provided by the oxalate framework, can coexist with other properties such as chirality, − magneto-chiral dichroism, spin transition, − proton conduction, − electric conductivity, − ferroelectricity, and second-order optical nonlinearity. − …”

Design and syntheses of hybrid supramolecular architectures: based on [Fe(C2O4)3]3− metallotectons and diverse organic cations

“…15 ) 3 ] 3− as a metallotecton linked to N-donor ligands to construct hybrid supramolecular frameworks is rare. [15][16][17][18]…”

Slow Relaxation of the Magnetization in Non-Linear Optical Active Layered Mixed Metal Oxalate Chains

“…As already reported, the best synthetic method to obtain compounds of the family of mixed oxalates of general formula [M III 2 M II (C 2 O 4 ) 6 ][DAMS] 4 [DAMBA] 2 ·2H 2 O (where M III = Rh, Fe, Cr; M II = Mn, Zn, Ni; DAMBA = p- N(CH 3 ) 2 C 6 H 4 CHO, [DAMS + ] = trans -4-(4-dimethylaminostyryl)-1-methylpyridinium) consists in a two step procedure . In the first step intermediated α MIII/MII phases are obtained by mixing in water K 3 [M(C 2 O 4 ) 3 ]· n H 2 O (M = Rh, Fe, Cr), M II (M = Mn, Zn, Ni) salts and [DAMS]I.…”

“…In the present study, we will report on the structural, second-order NLO, and magnetic properties of the Co II derivatives of this new class of multifunctional hybrid mixed metal oxalates first investigated in our laboratories, and in particular on the simultaneous occurrence, in one of them, of SCM-like behavior at low temperature still maintaining the high second order and NLO response.…”

“…However, in layered hybrid inorganic−organic crystalline materials structural distortions induced by changes of the magnetic ions into the inorganic layer can be easily absorbed without significantly altering the whole crystalline framework, making them particularly well suited for tuning in a rational way the magnetic properties without affecting the SHG efficiency. In this regard, we have recently reported the synthesis as well as the structural, magnetic, spectroscopic, and NLO characterization of a new promising family of magnetic and second-order NLO isostructural layered hybrid inorganic−organic materials of general formula [M III 2 M II (C 2 O 4 ) 6 ][DAMS] 4 [DAMBA] 2 ·2H 2 O (where M III = Rh, Fe, Cr; M II = Mn, Zn, Ni; DAMBA = p- N(CH 3 ) 2 C 6 H 4 CHO and [DAMS + ] is the second order NLO chromophore trans -4-(4-dimethylaminostyryl)-1-methylpyridinium cation; see Scheme ) …”