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A DASA displaying highly efficient and rapid reversible isomerization within sustainable nano/micro capsules: one step closer to sustainability.
Chem Sci
September 2024
College of Biomass Science and Engineering, Sichuan University Chengdu 610065 China
Article Synopsis
- Donor-acceptor Stenhouse adducts (DASAs) are eco-friendly compounds that can change form when exposed to light and heat, making them ideal for smart materials, but achieving quick transitions in solid forms with high bio-content is challenging.
- Researchers created a new kind of sustainable nano/micro capsule with 57% bio-content, combining PMMA and a special acid mixture, which allows for fast and effective isomerization of a specific DASA, achieving up to 90% efficiency under mild conditions.
- This breakthrough not only overcomes previous challenges in utilizing high bio-content materials but also opens up new applications for DASAs, such as in rewritable papers
Frequency-dependent nonlinear optical response and refractive index investigation of lactone-derived thermochromic compounds.
J Mol Graph Model
January 2024
Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan; Department of Chemistry, College of Science, University of Bahrain, Sakhir, 32038, Bahrain. Electronic address:
Nonlinear optical (NLO) switchable materials play a crucial role in the fields of electronics and optoelectronics. The selection of an appropriate switching approach is vital in designing such materials to enhance their NLO response. Among various approaches, thermos-switching materials have shown a 4-fold increase in NLO response compared to other photo-switching materials.
View Article and Find Full Text PDFChemical Manipulation of the Spin-Crossover Dynamics through Judicious Metal-Ion Dilution.
J Am Chem Soc
May 2023
School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
In 2019, our groups described a unique Fe complex, [Fe(L)(NCBH)] (L = -dimethyl--bis(2-pyridylmethyl)-1,2-ethanediamine) possessing a low-spin ground state that is not easily accessible due to the extremely slow dynamics of the high-spin to low-spin phase transition. Herein, we report the successful chemical manipulation of this spin-crossover (SCO) process through controlled metal-ion dilutions. The emergence or suppression of the thermally induced SCO behavior was observed depending on the radius of the metal ion used for the dilution (Ni or Zn).
View Article and Find Full Text PDFON/OFF Photo(switching) along with Reversible Spin-State Change and Single-Crystal-to-Single-Crystal Transformation in a Mixed-Valence Fe(II)Fe(III) Molecular System.
Inorg Chem
June 2023
Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C. V. Raman Road, Bangalore 560012, India.
A mixed-valence Fe(II)Fe(III) molecular system, {[Fe(pzTp)(CN)][Fe(bik)]}·[Fe(pzTp)(CN)]·4MeOH (·4MeOH) (bik = bis-(1-methylimidazolyl)-2-methanone, pzTp = tetrakis(pyrazolyl)borate), exhibits single-crystal-to-single-crystal (SC-SC) transformation while increasing the temperature and is converted into {[Fe(pzTp)(CN)][Fe(bik)]}·[Fe(pzTp)(CN)] (). Both complexes exhibit thermo-induced spin-state switching behavior along with reversible SC-SC transformation, where the low-temperature [FeFe] phase transforms into a high-temperature [FeFe] phase. ·4MeOH exhibits an abrupt spin-state switching with at 355 K, whereas undergoes a gradual and reversible spin-state switching with a lower at 338 K.
View Article and Find Full Text PDFEngineer RNA-Protein Nanowires as Light-Responsive Biomaterials.
Small
March 2023
Department of Chemical and Biological Engineering, Monash University, Clayton, VIC, 3800, Australia.
RNA molecules have emerged as increasingly attractive biomaterials with important applications such as RNA interference (RNAi) for cancer treatment and mRNA vaccines against infectious diseases. However, it remains challenging to engineer RNA biomaterials with sophisticated functions such as non-covalent light-switching ability. Herein, light-responsive RNA-protein nanowires are engineered to have such functions.
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