Review
Nanoscience & Nanotechnology
Thomas Ferreira de Lima, Eli A. Doris, Simon Bilodeau, Weipeng Zhang, Aashu Jha, Hsuan-Tung Peng, Eric C. Blow, Chaoran Huang, Alexander N. Tait, Bhavin J. Shastri, Paul R. Prucnal
Summary: This paper introduces neuromorphic photonic processors based on resonator weight banks, which are emerging candidate technology for enabling modern artificial intelligence in high speed analog systems. These purpose-built analog devices leverage the physics of resonator devices to implement vector multiplications, offering efficiency, latency, and throughput advantages over equivalent electronic circuits. However, the challenges of compensation for fabrication variations and environmental disturbances need to be addressed through automated design and control methodologies for practical deployment.
Review
Chemistry, Multidisciplinary
Mo Wang, Zhenfeng Zhang, Wanbin Zhang
Summary: This article introduces the development of chiral bicyclic imidazole catalysts by our research group, including their design, synthesis, and application. By using different skeletons and substituents, a series of highly active and selective catalysts were successfully prepared and applied in asymmetric synthesis reactions. This research provides important insights and guidance for exploring new organocatalysts and related reactions.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Polymer Science
Hui Zou, Shan-Shan Han, Guo-Qiang Li, Li Zhou, Na Liu, Zong-Quan Wu
Summary: Conjugated block copolymers consisting of poly(phenyl isocyanide) (PPI) and polyfluorene (PF) segments are synthesized via one-pot sequential polymerization of monomer 1 and monomer 2. These copolymers exhibit distinctive optical properties and fascinating chiral self-assembly behavior due to the helical conformation of PPI segment and pi-conjugated structure of PF segment. Furthermore, the self-assembled helical nanofibers display excellent circularly polarized luminescence performance.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Chenzhu Yin, Masakazu Mukaida, Shohei Horike, Kazuhiro Kirihara, Shogo Yamane, Zhenya Zhang, Qingshuo Wei
Summary: This research demonstrates the use of protonated 3,4-ethylene dioxythiophene moieties as end groups in the preparation of organic conductors. An organic semiconductor was designed and synthesized, which showed broad absorption in the near-infrared range when doped with protonic acid. The electrical conductivity of the doped semiconductor reached approximately 0.1 S cm(-1) at 100 degrees C.
Article
Chemistry, Multidisciplinary
Sara E. E. Kearney, Anghelo J. J. Gangano, Daniel G. G. Barrus, Kyle J. J. Rehrauer, Terry-Elinor R. Reid, Primali V. V. Navaratne, Emily K. K. Tracy, Adrian Roitberg, Ion Ghiviriga, Christopher W. W. Cunningham, Thomas Gamage, Alexander J. J. Grenning
Summary: The resorcinol-terpene phytocannabinoid template is a privileged scaffold for developing therapeutics targeting the endocannabinoid system. Axially chiral cannabinols (axCBNs) and axially chiral cannabidiols (axCBDs), inspired by cannabidiol (CBD), are unique structural modifications that enhance the physical and biological properties of cannabinoid ligands. These findings provide a promising direction for the design of novel cannabinoid ligands for drug discovery and exploration of the complex endocannabinoid system.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Review
Polymer Science
Aliya Nur Hasanah, Ike Susanti
Summary: The safety of medicinal products is determined by their pharmacological and toxicological profiles, which depend on both the active substance's toxicological properties and the impurities it contains. Many studies have been conducted on the separation and purification of active pharmaceutical ingredients (APIs) and the detection of impurities in APIs and drug products. Molecularly imprinted polymers (MIPs) have been applied in these studies to separate impurities and serve as adsorbents in sample preparation. The surface-imprinting polymerization method has shown advantages over the bulk polymerization method in terms of higher adsorption capacity and faster adsorption kinetics of MIPs. However, MIPs are currently only used for organic compounds in the analysis of APIs and drug products, and there is a need to develop MIPs for other impurities, including multi-template MIPs for simultaneous separation of multiple impurities.
Article
Optics
Rui Xi, Qiaolu Chen, Qinghui Yan, Li Zhang, Fujia Chen, Ying Li, Hongsheng Chen, Yihao Yang
Summary: This study proposes and experimentally demonstrates the existence of topological chiral edge states in valley photonic metamaterials, achieved by accurately tuning on-site edge potentials. The findings pave the way for exploring novel topological edge states in valley photonics and shed light on robust and miniaturized photonic devices.
LASER & PHOTONICS REVIEWS
(2022)
Article
Multidisciplinary Sciences
Jun-Kuan Li, Ge Qu, Xu Li, Yuchen Tian, Chengsen Cui, Fa-Guang Zhang, Wuyuan Zhang, Jun-An Ma, Manfred T. Reetz, Zhoutong Sun
Summary: This study presents an in silico strategy for the synthesis of chiral N- and O-heterocycles using a modified limonene epoxide hydrolase as a catalyst. By reshaping the active site, the reprogrammed enzyme enables the catalysis of Baldwin-type cyclizations, leading to high conversion rates and enantiomeric ratios.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Guang-Jian Mei, Jonathan J. Wong, Wenrui Zheng, Anjanay A. Nangia, K. N. Houk, Yixin Lu
Summary: The first catalytic asymmetric synthesis of N-N axially chiral compounds has been achieved, adding a new dimension to axially chiral molecules and atropisomerism. DFT calculations have been used to understand enantioselectivity and guide the design of similar molecules. Research on N-N axial atropisomerism holds promise for new discoveries in medicinal chemistry and asymmetric catalysis.
Article
Engineering, Chemical
Entesar Al-Hetlani, Narendran Rajendran, Anand BabuVelappan, Mohamed O. Amin, Basma Ghazal, Saad Makhseed
Summary: 4Czpyz-poly is a novel microporous polymer with excellent adsorption properties for capturing CO2 gas and removing pollutants from wastewater. The polymer showed high efficiency in adsorbing various substances, with good reusability and adsorption performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Polymer Science
Alexis Emmerich, Constantin C. Daniliuc, Armido Studer
Summary: The stereospecific ionic ring-opening polymerization of various donor-acceptor cyclopropanes allows for the preparation of chiral polymers, with the potential for diverse applications by adjusting the substituents of the monomers.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Review
Chemistry, Analytical
Pengyi Wang, Benjamin L. Miller
Summary: Photonic chip-based waveguide-enhanced Raman spectroscopy (WERS) is an interesting method that utilizes the evanescent field of a waveguide to generate Raman scattering and collect scattered photons, leading to significant enhancements in Raman signal. Coating the waveguide with a selective sorbent material further improves the enhancement effect.
Article
Chemistry, Multidisciplinary
Leisan Gilmanova, Ruslan Shekurov, Mikhail Khrizanforov, Kamil Ivshin, Olga Kataeva, Volodymyr Bon, Irena Senkovska, Stefan Kaskel, Miluykov Vasily
Summary: In this study, the first example of a phosphinic acid containing Ugi's amine was presented, which facilitated the synthesis of a coordination polymer based on Ugi's amine. The crystal structure of both ligand and polymer were solved, revealing a strong interaction between iron and nickel within the coordination polymer structure.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Qing-Qing Hang, Shu-Fang Wu, Shuang Yang, Xue Wang, Zhen Zhong, Yu-Chen Zhang, Feng Shi
Summary: The catalytic atroposelective synthesis of axially chiral isochromenone-indoles has been achieved using homophthalic anhydride-based indole derivatives as a new platform molecule for dynamic kinetic resolution. A wide range of axially chiral isochromenone-indoles were synthesized in high yields and excellent enantioselectivities using chiral quaternary ammonium salt as a phase-transfer catalyst in the catalytic asymmetric sulfonylation reaction.
SCIENCE CHINA-CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Maryam Arabi, Abbas Ostovan, Yunqing Wang, Rongchao Mei, Longwen Fu, Jinhua Li, Xiaoyan Wang, Lingxin Chen
Summary: Chiral discrimination is crucial in environmental and life sciences, but an ideal discrimination strategy has not been developed yet due to nonspecific binding and insufficient optical activities. Researchers propose an inspector recognition mechanism based on chiral imprinted polydopamine and surface-enhanced Raman scattering, allowing for absolute discrimination of various chiral molecules.
NATURE COMMUNICATIONS
(2022)
Article
Polymer Science
Alisson J. Santana, Denis A. Turchetti, Cristiano Zanlorenzi, Jose C. R. Santos, Edson Laureto, Adilson J. A. De Oliveira, Leni Akcelrud
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
(2019)
Article
Spectroscopy
Fabiane dos Santos Carlos, Rafael Frasson Monteiro, Leticia Aparecida da Silva, Cristiano Zanlorenzi, Fabio Souza Nunes
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2020)
Article
Chemistry, Inorganic & Nuclear
Fabiane dos Santos Carlos, Leticia Aparecida da Silva, Cristiano Zanlorenzi, Fabio Souza Nunes
INORGANICA CHIMICA ACTA
(2020)
Article
Chemistry, Physical
D. A. Turchetti, C. Zanlorenzi, L. G. T. A. Duarte, R. F. S. Santos, T. D. Z. Atvars, R. A. Domingues, L. C. Akcelrud
JOURNAL OF PHYSICAL CHEMISTRY B
(2020)
Article
Materials Science, Multidisciplinary
Emerson C. G. Campos, Denis A. Turchetti, Alisson J. Santana, Raquel A. Domingues, Luis G. T. A. Duarte, Teresa D. Z. Atvars, Leni Akcelrud
Summary: The study presents a hybrid structure polymer complexed with europium ions, exhibiting luminescence sensitive to viscous chemical environments. The material shows dual-emission profile with red luminescence in DMF and DMSO, and blue emission in chloroform and toluene. DMSO and DMF are suggested to restrict intramolecular motion/rotation, minimizing non-radioactive energy losses and promoting europium luminescence.
Article
Polymer Science
Ana Paula Glislere, Denis Turchetti, Bruno Nowacki, Cristiano Zanlorenzi, Leni Akcelrud
Summary: Study on two copolymers, one with a chiral center and another without any asymmetric site, showed that pure polymers did not exhibit any chiro-optical activity. However, blends containing the achiral component displayed significant chiro-optical activity, attributed to stable supramolecular structures unaffected by blend composition. This suggests that utilizing supramolecular morphology can be a key strategy in achieving chiro-optical active polymers.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Polymer Science
Andre Ferreira, Denis Turchetti, Alisson Santana, Leni Akcelrud, Yvonne Mascarenhas
Summary: This research analyzed the crystallites of poly(9,9'-dihexylfluorene) (PHF) and found orthorhombic unit cells with average crystallite sizes of 43.86 angstrom, spherical nanoparticles morphology with average diameters of 69.20 nm, and a possible relationship between the fluorescent properties and the parallel alignment of the chains in the crystallites.
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
(2021)
Article
Polymer Science
Emerson C. G. Campos, Denis A. Turchetti, Cristiano Zanlorenzi, Raquel A. Domingues, Luis G. T. A. Duarte, Teresa D. Z. Atvars, Leni Akcelrud
Summary: The work explores the solvent effects on the photophysical properties of a terbium copolymer, indicating that the terbium emission is sensitive to the chemical environment and that an aggregation-induced emission phenomenon may occur in certain solvents. Theoretical studies suggest that the DMSO environment may optimize the energy transfer to the terbium ion.
Article
Polymer Science
Alisson J. Santana, Denis A. Turchetti, Cristiano Zanlorenzi, Jose C. R. dos Santos, Adilson J. A. de Oliveira, Leni Akcelrud
Summary: This study investigates the magnetic properties of a polyfluorene derivative and its complexes with neodymium ions, showing that the introduction of Nd atoms leads to paramagnetic behavior in the polymer. The research also demonstrates the significant role of morphology, with polymer forms containing smaller salt ligands exhibiting enhanced magnetic properties compared to those with bulky beta-diketone groups.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2022)
Article
Polymer Science
Andre A. Ferreira, Denis A. Turchetti, Alisson J. Santana, Leni C. Akcelrud, Karina de Paula, Yvonne P. Mascarenhas
Summary: This research synthesized a new PHF/n-Eu2O3 nanocomposite and characterized its crystalline structures and morphologies. The results showed that the unit cells and crystallite size of the nanocomposite could be obtained through XRD analysis. The optical properties of the nanocomposite were found to be correlated with the ordering of the polymer chains, crystallinity, and morphology of the mixed nanoparticles.
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Samylla Boazegevski, Jeferson Ferreira de Deus, Denis Augusto Turchetti, Leni Campus Akcelrud, Samim Sardar, Cosimo D'Andrea, Franco V. A. Camargo, Giulio Cerullo, Giovanni Bressan, Stephen R. Meech, Ismael A. Heisler
Summary: A detailed photophysical study was conducted on a polymer based on a fluorene derivative using ultrafast nonlinear spectroscopy. The study found significant differences in the photophysical behavior of the polymer in solution and as a film, suggesting a near absence of self-collapsed chain conformations in solution. In the film, interchain interactions promote efficient energy transfer, resulting in faster excited state relaxation compared to solution. The time scales of exciton dynamics revealed in this study are useful for designing blends for optoelectronic and electro-optical devices.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Silesia de Fatima Curcino da Silva, Denis Augusto Turchetti, Eralci M. Therezio, Jose Roberto Tozoni, Leni Akcelrud, Alexandre Marletta
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2019)
Article
Materials Science, Multidisciplinary
Cristiano Zanlorenzi, Bruno Nowacki, Leni Akcelrud
JOURNAL OF MATERIALS CHEMISTRY C
(2019)
