Article
Chemistry, Organic
Max Born, Thomas C. Fessard, Lucas Goettemann, Jakob Plank, Thomas M. Klapoetke
Summary: This study presents a new method for the synthesis of poly(3-azidooxetane), which offers increased yield and improved safety compared to its precursor, 3-azidooxetane. The thermal behavior, energetic performance, plasticizer compatibility, and curing of poly(3-azidooxetane) were thoroughly investigated, and it was found to be a suitable substitute for GAP, with potentially more environmentally friendly properties.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Polymer Science
Sanhanut Kesornsit, Chatrawee Direksilp, Katesara Phasuksom, Natlita Thummarungsan, Phimchanok Sakunpongpitiporn, Kornkanok Rotjanasuworapong, Anuvat Sirivat, Sumonman Niamlang
Summary: Poly(3-hexylthiophene) (P3HT) was synthesized by chemical oxidative polymerization using ferric chloride (FeCl3) as the oxidizing agent and various surfactants as shape templates. The effects of mole ratios, polymerization times, and surfactant types and concentrations on the electrical conductivity and particle properties were investigated. The results showed that P3HT synthesized with dodecylbenzenesulfonic acid (DBSA) at Critical Micelle Concentration (CMC) 6 had the highest electrical conductivity and particle size of 1530 +/- 227 nm. The thermal analysis revealed that surfactant-synthesized P3HT had higher stability and char yields. The electrical conductivity of DBSA-synthesized P3HT was further enhanced by doping with HClO4.
Article
Chemistry, Multidisciplinary
Thao T. Bui, Tam H. Nguyen, Hai L. Tran, Chau D. Tran, Duong T. Le, Dai N. Dao, Thao P. L. Nguyen, Luan T. Nguyen, Le-Thu T. Nguyen, Thiet Q. Nguyen, Son T. Cu, Mai H. Hoang, Tsutomu Yokozawa, Ha T. Nguyen
Summary: A conjugated diblock copolymer, P3HT-b-PDCTMA, was synthesized via Grignard metathesis and organo-catalyzed atom transfer radical polymerization, with a conversion of 73%. The copolymer showed an M-n of 17,500 g/mol, close to the theoretical value, and a polydispersity index (D) of 1.42. The copolymer bears reactive triazine chloride groups, allowing efficient nucleophilic aromatic substitution reactions with mercaptan or amine groups. The chemical structures and properties of the copolymer were characterized using FT-IR, H-1 NMR spectroscopy, and gel permeation chromatography, while UV-Vis spectroscopy was used to investigate its optical properties and conformation.
Article
Polymer Science
Kevin Nixon, Rui Sun, Yossef A. Elabd
Summary: In this study, 3-, 4-, and 6-arm star poly(vinylbenzyl methylimidazolium chloride) were synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization with a core-first approach, resulting in uniform number and length of polymer arms. The effect of initial radical initiator concentration and number of functional groups per multifunctional RAFT agent on polymerization reaction kinetics was investigated. Increasing the initial radical initiator concentration led to faster monomer conversion, while decreasing the number of functional groups per multifunctional RAFT agent resulted in a decrease in the initial rate retardation in reaction kinetics. This work demonstrates a facile method for synthesizing ion-containing star polymers with uniform number and length of polymer arms, showing potential as a new material for electrochemical energy devices due to property enhancements associated with their star polymer architecture.
Article
Materials Science, Multidisciplinary
Sheng Li, Rosemary Cranston, Benoit H. Lessard, Dwight S. Seferos
Summary: The study focuses on the self-assembly behavior of conjugated polymers at different degrees of polymerization, with statistical copolymer gels showing higher conductivity after cycle-doping and maintaining high conductivity even after seven doping cycles. Grazing incident wide-angle X-ray scattering suggests an inter-charge transfer doping mechanism between the polymer and dopant.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Polymer Science
Busra Nakipoglu, Cansu Aydogan, Mucahit Ozdemir, Yusuf Yagci, Sermet Koyuncu, Baris Kiskan
Summary: This study presents a simple and efficient method for synthesizing conjugated poly(phenylene butadiynylene) (PPB) polymers using photo-induced radical homocoupling. The resulting PPB polymers exhibited a red shift in the optical properties and a decrease in the band gap and oxidation potential. Transmission electron microscopy and atomic force microscopy measurements revealed the self-organization of the PPB polymers into planar 2D nanorods, supported by density functional theory calculations. The surface area of the polymer was determined to be 53.61 and 30.69 m(2)/g using Brunauer-Emmett-Teller and Barrett-Joyner-Halenda methods, respectively.
Article
Polymer Science
Xiao-Juan Wang, Gao-Wei Li, Ming-Yang Mo, Shuai-Hua Shi, Si-Yu Li, Xin-Yi Liu, Lan-Tao Liu
Summary: In this study, block copolymers were synthesized and their self-assembly behavior was investigated. Various polymer nano-assemblies with different shapes were obtained using different microscopy and optical property measurement methods. The introduction of specific functional groups endowed the block copolymers with the ability to self-assemble, and these conjugated copolymers also showed potential applications.
Article
Polymer Science
Anna Grobelny, Karolina Lorenc, Lucja Skowron, Szczepan Zapotoczny
Summary: This study presents a new method for synthesizing ladder-like donor-acceptor polymer brushes, achieving proper arrangement of pendant donor and acceptor groups through alternating copolymerization. Dense brushes can be obtained in a single polymerization process without the use of toxic metal catalysts or bulky substituents.
Article
Chemistry, Analytical
S. C. Perry, S. Arumugam, S. Beeby, I. Nandhakumar
Summary: A template-free method for electrochemical deposition of P3HT has been developed. Electrodeposition is preceded by an electrochemical nucleation step, enabling the production of a uniform film without the need for pre-treatment of the electrode surface. The resulting film is highly nanostructured, conductive, and easily delaminates for analysis. This technique offers a simple route to conductive organic films for various applications.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Polymer Science
Tomohiro Kubo, Morgan S. Young, Kendra D. Souther, Matthew D. Hannigan, Anne J. McNeil
Summary: The discovery of catalyst-transfer polymerization allows unprecedented control over the length and sequence of conjugated polymers. A new method for high yield synthesis of poly(3-hexylthiophene) without the need for an inert atmosphere has been developed, making the process more accessible to a broader range of researchers.
JOURNAL OF POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Hao Xu, Shuyang Ye, Ruyan Zhao, Dwight S. Seferos
Summary: Sequence-defined synthetic oligomers and polymers offer unprecedented control over properties of materials. This study presents a novel strategy to synthesize monodisperse sequence-defined conjugated oligomers, achieving precision control over properties. The researchers successfully synthesized a series of oligomers with different monomers and sequences, and demonstrated the effect of monomer sequence on optical properties.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Tomaz Kotnik, Gregor Zerjav, Albin Pintar, Ema Zagar, Sebastijan Kovacic
Summary: A new synthetic route to transition-metal free pi-conjugated polyHIPEs was reported, combining Schiff-base condensation reaction and emulsion-templating technology. The resulting highly porous azine- or imine-linked poly(arylene) networks exhibit high chemical resistance, thermal stability, and visible-light harvesting ability. Their photocatalytic properties were investigated in the degradation of aniline dissolved in water.
Article
Chemistry, Multidisciplinary
Mami Miyairi, Tsuyoshi Taniguchi, Tatsuya Nishimura, Katsuhiro Maeda
Summary: Improved methods for the synthesis of linear and cyclic poly(diphenylacetylene)s using MoCl5- and WCl4-based catalytic systems have been developed. MoCl5 induces migratory insertion polymerization of diphenylacetylenes in the presence of arylation reagents such as Ph4Sn and (ArSnBu3)-Bu-n to produce cis-stereoregular linear poly(diphenylacetyelene)s with high molecular weights. On the other hand, WCl4 induces ring expansion polymerization of diphenylacetylenes in the presence of Ph4Sn or reducing reagents to produce cis-stereoregular cyclic poly(diphenylacetylene)s with high molecular weights. Both catalytic systems are applicable to the polymerization of various diphenylacetylenes having polar functional groups such as esters that are not efficiently polymerized by conventional methods.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Wei-Chen Yang, Yan-Cheng Lin, Shin Inagaki, Hiroya Shimizu, Ender Ercan, Li-Che Hsu, Chu-Chen Chueh, Tomoya Higashihara, Wen-Chang Chen
Summary: In this study, polymer materials were used to simulate neural processes in a photosynaptic transistor, achieving excellent features such as long-term and short-term memory, as well as ultra-low energy consumption. This work has significant implications for the development of artificial intelligence technology.
Review
Chemistry, Multidisciplinary
Susan Cheng, Ruyan Zhao, Dwight S. Seferos
Summary: The study of conjugated polymers has been an interdisciplinary field focusing on advancing synthesis with the goal of expanding monomer diversity and controlling polymerization. The Kumada catalyst-transfer polymerization (KCTP) has shown promise in achieving predictable molecular weights and specific structures, but challenges remain in broadening the scope of monomers beyond traditional ones like 3-alkylthiophenes.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Chemistry, Physical
Jaehyun Park, Cheol Woo Lee, Se Hun Joo, Ju Hyun Park, Chihyun Hwang, Hyun-Kon Song, Young Seok Park, Sang Kyu Kwak, Seokhoon Ahn, Seok Ju Kang
JOURNAL OF MATERIALS CHEMISTRY A
(2018)
Article
Chemistry, Multidisciplinary
Feng-Yang Shih, Deokkyu Choi, Qin Wu, Chang-Yong Nam, Robert B. Grubbs
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2019)
Article
Biophysics
Xuechen Yin, David R. O. Hewitt, Alyssa N. Preston, Luke A. Heroux, Michael M. Agamalian, Suan P. Quah, Bingqian Zheng, Andrew J. Smith, Scott T. Laughlin, Robert B. Grubbs, Surita R. Bhatia
COLLOIDS AND SURFACES B-BIOINTERFACES
(2019)
Article
Chemistry, Multidisciplinary
Palas Baran Pati, Eunji Jin, Yohan Kim, Yongchul Kim, Jinhong Mun, So Jung Kim, Seok Ju Kang, Wonyoung Choe, Geunsik Lee, Hyung-Joon Shin, Young S. Park
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Polymer Science
David R. O. Hewitt, Robert B. Grubbs
Summary: Polymerization of ethyl glyoxylate can be initiated from alcohols or thiols by activation with triethylamine, resulting in poly(ethyl glyoxylate) with controllable molecular weights and relatively low dispersities. Stabilization against depolymerization by chain-capping with benzyl chloroformate can proceed without side reactions observed from chain-capping with tolyl isocyanate.
Article
Chemistry, Physical
Asmat Ullah, Keun Hyeong Park, Hieu Dinh Nguyen, Yasir Siddique, S. F. A. Shah, Huyen Tran, Sunghyeok Park, Seok In Lee, Kyung-Koo Lee, Chi-Hwan Han, Kihwan Kim, SeJin Ahn, Inyoung Jeong, Young S. Park, Sungjun Hong
Summary: Recent advancements in perovskite solar cells have shown improvements in performance through enhanced interfacial engineering and charge selective contacts. A novel phenothiazine-based self-assembled monolayer has been introduced as a hole-selective contact, demonstrating significantly improved charge extraction/transport and device stability, leading to high power conversion efficiencies and exceptional operational stability.
ADVANCED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xuechen Yin, David R. O. Hewitt, Bingqian Zheng, Xiaoxi Yu, Amanda J. Carr, Robert B. Grubbs, Surita R. Bhatia
Summary: The self-assembly behavior of poly(ethyl glyoxylate)-poly(ethylene oxide)-poly(ethyl glyoxylate) triblock copolymers in aqueous environments was investigated. The study found that these copolymers can form associative micellar gels, and the mechanical properties and nanoscale structures of the gels can be tailored by adjusting the length of the PEtG blocks.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Asmat Ullah, Keun Hyeong Park, YoungWan Lee, Sujung Park, Abdullah Bin Faheem, Hieu Dinh Nguyen, Yasir Siddique, Kyung-Koo Lee, Yimhyun Jo, Chi-Hwan Han, SeJin Ahn, Inyoung Jeong, Shinuk Cho, BongSoo Kim, Young S. Park, Sungjun Hong
Summary: Inverted perovskite solar cells offer advantages such as easy processing and high stability, but face challenges in achieving high power conversion efficiency. This study introduces excellent hole-selective materials for inverted PSCs and demonstrates the potential of engineered self-assembled monolayers (SAMs) in achieving high-performance solar cells. The Se-containing SAM shows the strongest interaction with the perovskite absorber and achieves a PCE of 22.73%.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Seonghwa Jeong, Eunji Park, Jiyeon Kim, Seok Bae Park, Sung Hoon Kim, Wonyoung Choe, Joonghan Kim, Young S. Park
Summary: This study reports the synthesis and characterization of a B2N2 anthracene derivative with continuous multiple BN units, which exhibits significant variations in bond length and energy gap compared to its all-carbon analogue. The findings may facilitate the development of larger acenes with multiple BN units and potential applications in organic electronics.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Jupil Park, So Jung Kim, Hansol Kwon, Eunji Jin, Kihwan Yoon, HyunHo Kim, Sahar Shadman, Wonyoung Choe, Joonghan Kim, Young S. Park
Summary: Compared to the study of BN heterocycles, research on PN heterocycles is limited. We developed an efficient synthetic strategy to simultaneously introduce a PN bond and a halogen group into the naphthalene core, successfully preparing a PN-containing tetraphenylnaphthalene through palladium-catalyzed cross-coupling and reduction reactions. The molecule was characterized using X-ray crystallography, NMR spectroscopy, UV-vis spectroscopy, and cyclic voltammetry.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Juhwan Kim, Mehran J. Umerani, Reina Kurakake, Huiting Qin, Joseph W. Ziller, Alon A. Gorodetsky, Young S. Park
Summary: The study validates a general strategy for synthesizing chloro-containing quinoline, benzoquinoline, and polybenzoquinoline variants via the aza-Diels-Alder reaction, which could potentially open new opportunities for synthesizing analogous materials.
Article
Chemistry, Multidisciplinary
Yelim Yi, Yuxi Lin, Jiyeon Han, Hyuck Jin Lee, Nahye Park, Geewoo Nam, Young S. Park, Young-Ho Lee, Mi Hee Lim
Summary: The study shows that sphingosine (SP) interacts with both amyloid-beta (Aβ) and metal ions, affecting their aggregation and potentially exacerbating the toxicity induced by Aβ in living cells. The acyl derivatives of SP also influence Aβ aggregation to different degrees, with slight structural modifications neutralizing their cytotoxic effects. These findings suggest that SP and its derivatives could directly interact with pathological factors in Alzheimer's disease and modify their pathogenic properties.
Article
Materials Science, Multidisciplinary
Daniel H. Yi, Chang-Yong Nam, Gregory Doerk, Charles T. Black, Robert B. Grubbs
ACS APPLIED POLYMER MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
Ashwanth Subramanian, Gregory Doerk, Kim Kisslinger, Daniel H. Yi, Robert B. Grubbs, Chang-Yong Nam
Article
Polymer Science
Paige A. Shaw, Maxime Klausen, Mark Bradley
Summary: A light-responsive polymer capable of controlled release of camptothecin and generation of reactive oxygen species (ROS) was developed, which exhibited high cancer cell killing activity through both camptothecin release and ROS generation.
Article
Polymer Science
Donghui Zhang, Shiqi Liu, Zhihao Cai, Weizhe Luo, Guojian Liu, Runhui Liu
Summary: A straightforward and efficient method for synthesizing NPC monomers has been developed in this study, which enhances the availability of NPC monomers and facilitates the synthesis of polypeptides.
