Anisotropic Ferromagnetic Organic Nanoflowers

Abstract

We report a weak anisotropic ferromagnetic behavior in a purely organic molecule at room temperature, a property rarely reported in organic nanomaterials. The reported 1,2-bis­(tritylthio)­ethane, forming plate- and organic-flower-like morphologies at the nanolevel, is the first organic crystal with an inherent magnetic property at 300 and 2 K. However, at low temperatures, the magnetization value [M max(T) ∼ 116 emu/mol at 2 K] increases drastically at 3 orders higher compared to 300 K. Interestingly, the system exhibits strong anisotropy with an anisotropic constant, K 1 ∼ 3.25 × 103 erg/cc, and anisotropy field, H K ∼ 3.25 kOe. Below 10 K, this system displays unusual temperature dependence of the coercive field [H C(T)] and remanence magnetization [M R(T)] with a hysteresis-peak anomaly (T* ∼ 10–15 K) due to the enhanced spin–orbit coupling. The maximum H C and M R at T* were H C = 220 Oe and M R ∼ 12 emu/mol, respectively. Beyond T*, H C(T) and M R(T) drop continuously and become negligible as the measurement temperature approaches 300 K. Our results demonstrate that the triphenyl molecules can be further exploited for the design and synthesis of organic magnets for possible applications in spintronics and memory storage devices.

Antibacterial hydrogels of aromatic tripeptides

“…These bioinspired nanostructures are attractive due to their biocompatibility, ability for molecular recognition, and ease of chemical modifications. 1,2 These assemblies are modulated in molecular designs by exploiting the hydrogen-bonding properties of participating amino acids, hydrophobicity, 3 tacticity, [4][5][6][7][8][9][10] aromatic interactions, [11][12][13][14] chain length, 15 and amino acid chirality. [16][17][18] Short peptides have some unique advantages such as good biocompatibility and low immunogenicity, while we consider them for designing functional biomaterials.…”

Recent Advances in the Strategies of Simultaneous Enzyme Immobilization Accompanied by Nanocarrier Synthesis

“…Moreover, the flower-like structure offers a larger contact area for biomolecules to bind, making nanoflowers particularly suitable for applications in biosensors and bioimaging. Based on differences in composition, nanoflowers can be classified into several types, including inorganic nanoflowers [27][28][29][30], organic nanoflowers [31][32][33], and hybrid nanoflowers…”

“…Moreover, the flower-like structure offers a larger contact area for biomolecules to bind, making nanoflowers particularly suitable for applications in biosensors and bioimaging. Based on differences in composition, nanoflowers can be classified into several types, including inorganic nanoflowers [27][28][29][30], organic nanoflowers [31][32][33], and hybrid nanoflowers (consisting of both organic and inorganic components) [28]. In 2012, Ge et al [34] first discovered the formation of organic-inorganic hybrid nanoflowers by co-incubating proteins, copper ions, and phosphates.…”

Efficient Biosorption of Hexavalent Chromium from Water with Human Hair

“…Aromatic π–π interaction or π stacking involves interaction of aromatic molecules, resulting in the formation of self-assembled molecules − which can be fabricated for various applications such as catalysts, aggregation disruptors, nanodots, and artificial enzymes . Our laboratory has earlier reported a novel organic molecule 1,2-bis­(tritylthio)­ethane which forms a rare organic nano-flower showing magnetic properties. , The nano-assembly was coated with magnetite nanoparticles to synthesize a functional trityl-magnetite hybrid material, which has resulted into a potent nano-adsorbent for the removal of toxic and heavy metal. In this study, we have evaluated the capacity of a trityl-magnetite hybrid material for Cr removal.…”

“… 28 Our laboratory has earlier reported a novel organic molecule 1,2-bis(tritylthio)ethane which forms a rare organic nano-flower showing magnetic properties. 29 , 30 The nano-assembly was coated with magnetite nanoparticles to synthesize a functional trityl-magnetite hybrid material, which has resulted into a potent nano-adsorbent for the removal of toxic and heavy metal. In this study, we have evaluated the capacity of a trityl-magnetite hybrid material for Cr removal.…”