Article
Polymer Science
Maciej Barlog, Santhosh Kumar Podiyanachari, Salahuddin Attar, Dusan N. Sredojevic, Hassan S. Bazzi, Mohammed Al-Hashimi
Summary: The synthesis of highly conjugated chromophore functional hyperbranched polymers still poses a challenge. In this study, a series of cycloolefin monomers based on oxanorbornene imides were introduced to encapsulate perylene diimide-derived A-D-A-type chromophores in non-conjugated polymer matrix via ROMP. The experimental and theoretical analysis revealed the control over pi-pi stacking behavior of PDI-derived chromophores, offering potential for high solubility and quality film formation tailored for photovoltaic applications.
Article
Polymer Science
Salih Ertan, Murat Kaya, Atilla Cihaner
Summary: A new analog of poly (3,4-propylenedioxythiophene) conjugated polymers called PProDOT-POSS was reported, with integrated POSS nanocage structure. The polymers were synthesized via both chemical and electrochemical methods, soluble in common organic solvents, exhibited fluorescent property, and had an optical bandgap of 1.95 eV.
Article
Engineering, Environmental
Yanli Wang, Junwei He, Hong Sun, Liming Zou, Yan Vivian Li
Summary: In this study, PVA/HBPL fluorescent nanofiber mats (FNM) were fabricated by synthesizing Hyperbranched poly (phenylalanine-lysine) (HBPL) and mixing it with Polyvinyl Alcohol (PVA). The mechanical and fluorescent properties of PVA/HBPL FNM were investigated, as well as its sensing ability for Cu2+ ions. Different mass ratios of PVA and HBPL were characterized, and PVA/HBPL FNM showed higher tensile strength and Young's modulus compared to neat PVA NM. Furthermore, thermally cross-linked (TCL)-PVA/HBPL FNM with improved water solubility was fabricated. The results demonstrated that TCL-PVA/HBPL FNM exhibited excellent recognition for Cu2+ ions and a linear relationship between fluorescence intensity and Cu2+ concentration in a certain range. Therefore, this study has significant potential for applications in heavy metal ion detection sensors.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Chemistry, Applied
Junjie Cui, Ji Eon Kwon, Dong Ryeol Whang, Soo Young Park
Summary: A simple and versatile strategy was developed to fabricate a highly luminescent and deep-red emitting supramolecular hydrogel by using water-soluble and highly luminescent bis-pyridine molecule in combination with commercial poly(acrylic acid). The resulting hydrogel has a high water content, homogeneous and transparency, with efficient deep-red fluorescence.
Article
Chemistry, Organic
Isabel N. Hegarty, Adam F. Henwood, Samuel J. Bradberry, Thorfinnur Gunnlaugsson
Summary: This paper describes the synthesis of two new polymers, P1 and P2, made from P(E-alt-MA) with 2,6-bis(1,2,3-triazol-4-yl)pyridine (btp) ligand side chains. These polymers were shown to be soluble in MeOH solution and P1 was also soluble in water, while P2 required prolonged heating for water dissolution. Both P1 and P2 were demonstrated to bind to Tb(iii) ions and exhibit luminescence through UV-Vis absorption, fluorescence emission, and time-gated phosphorescence spectroscopies. The analysis of titration data revealed a 1:2 (M:L; Tb(iii) : btp) stoichiometry, indicating crosslinking of two btp ligands and coordination by the polymer backbone.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Physical
Hyun-Jun Lee, Abasi Abudulimu, Juan Carlos Roldao, Hyunwoo Nam, Johannes Gierschner, Larry Lueer, Soo Young Park
Summary: A highly efficient photocatalytic system for hydrogen evolution was developed using self-assembled nanoparticles based on an octupolar molecule. The addition of halide ions improved the rate of hydrogen evolution reaction due to the external heavy atom effect enhancing intersystem crossing. The highest hydrogen evolution rate of the system reached 460 mmol/g.h with the presence of iodide ions and a metal co-catalyst. Moreover, the photocatalytic system without any halide ion additives showed remarkable efficiency in hydrogen generation from seawater using stimulated sunlight (apparent quantum yield of about 3.8%).
Article
Chemistry, Multidisciplinary
Yixin Dong, Xiyue Dong, Di Lu, Mingqian Chen, Nan Zheng, Rui Wang, Qiaohui Li, Zengqi Xie, Yongsheng Liu
Summary: In this study, a new organic semiconductor spacer, BThDMA, was developed for 2D DJ perovskite solar cells. Compared to other spacers, BThDMA showed stronger orbital interactions and crystal growth ability, resulting in improved efficiency and stability of the cells.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Seong Il Kim, Hyeong Ju Kim, Soo Young Park
Summary: In this study, a highly fluorescent zero-dimensional nano-ring supramolecular organic framework (SOF) was designed using CB[8] as the host and a novel bent-shaped cyanostilbene guest. The host-guest complex successfully formed a macrocyclic hexamer and exhibited significantly enhanced fluorescence (phi(F)=68%) compared to the non-assembled monomer (phi(F)=2%). Unlike other SOFs, this 0D SOF could be uniformly dispersed in water without bundling phenomenon.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Applied
Byung Hak Jhun, Soo Young Park, Youngmin You
Summary: Circularly polarized luminescence (CPL) is a unique way of emitting light that can be used for visualizing target analytes. CPL sensors can detect changes in an asymmetric environment by altering the polarization direction, magnitude, or peak wavelength of emitted light.
Article
Chemistry, Physical
Illia E. Serdiuk, Seyoung Jung, Michal Monka, Chi Hyun Ryoo, Soo Young Park
Summary: In the search for high energy organic materials for blue OLEDs, a tunability of the triplet state localized on phenyl-s-triazines (3LE) was discovered. This tunability, achieved by substitution at s-triazine, plays a key role in achieving fast reverse intersystem crossing (rISC) and high external quantum efficiency (EQE) in OLEDs. By using phenyl-s-triazines with high 3LE energies as electron acceptors, a series of blue TADF emitters were developed. However, the enhanced 3LE-1CT interaction was found to be beneficial for ISC but not for rISC, contradicting the three-state model prediction. Instead, the direct 3CT -> 1CT interaction was found to be crucial for rISC and OLED efficiency. It is concluded that enhancing the 3CT -> 1CT transition should be a novel design rule for blue TADF emitters.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Seung Hwa Hong, Seong Il Kim, Dong Won Kim, Soo Young Park
Summary: We propose a high crystallized small-molecule dopant-free hole transporting material (HTM) called DEG-IDIDF, based on the indolo [3,2-b]indole (IDID) core unit integrated with flexible diethylene glycol (DEG) side chains. The DEG side chains contribute to tight molecular packing and high film crystallinity, enhancing hole mobility. The DEG-IDIDF based PSCs have higher power conversion efficiency (16.60%) compared to the commonly used PEDOT:PSS based PSCs (12.04%) under the same inverted PSC structures. Moreover, the DEG-IDIDF based PSCs exhibit outstanding thermal stability with over 80% initial efficiency after 500 hours of thermal stress at 60 degrees C.
ORGANIC ELECTRONICS
(2023)
Article
Chemistry, Physical
Suinan Deng, Wenjun Luo, Lianjie Zhang, Guojing Xie, Shuyi Lei, Mei Luo, Zuhao Wu, Dong Yuan, Jiahao Liang, Zengqi Xie, Junwu Chen
Summary: Aromatic substituent engineering of side chains is crucial for molecular structure and properties. Through efficient regioselective acylation, the key aromatic substituted cores of simple nonfullerene acceptors were successfully realized. The synthesized acceptors, Ph-BDD and C4Ph-BDD, exhibited different aggregation and crystallinity due to the difference in the phenyl-substituted benzodithiophenedione core moiety. Ph-BDD with bare benzene rings showed a higher power conversion efficiency (PCE) of 13.64% compared to C4Ph-BDD (PCE of 11.37%). Both Ph-BDD and C4Ph-BDD-based devices retained 97% of their original efficiency after more than 60 days of air storage. This study highlights the importance of feasible regioselective acylation for the development of stable and high-performing nonfullerene solar cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Hyunho Park, Illia E. Serdiuk, Soo Young Park
Summary: Designing a metal-free photocatalyst for the photocatalytic hydrogen evolution reaction (HER) is important, but the poor visible light absorption of graphene quantum dots (GQDs) limits their efficiency. By functionalizing GQDs with hexylamine (HA) through the amide bond formation reaction, we synthesized amphiphilic GQD-HA that acts as a photocatalyst and templating surfactant. The composite nanoparticles of GQD-HA and thermally activated delayed fluorescence (TADF) photosensitizers show enhanced stability and HER performance due to efficient charge separation and fast charge transfer.
Article
Chemistry, Applied
Seung Hwa Hong, Dong Won Kim, Soo Young Park
Summary: We propose an eco-friendly aqueous process to obtain efficient/stable small molecule organic field effect transistors (OFETs). Penta-ethylene glycol (PEG) side chains were introduced to the rigid backbone structures of indolo[3,2-b]indole(IDID), leading to the formation of PEG-IDIDF. The addition of water as a cosolvent significantly enhances the film crystallinity and molecular stacking orientation of PEG-IDIDF, resulting in improved hole mobility and current on/off ratio for the PEG-IDIDF OFETs processed with ethanol water cosolvent (90:10) ratio.
Article
Multidisciplinary Sciences
Ningning Tang, Jiadong Zhou, Liangxuan Wang, Matthias Stolte, Guojing Xie, Xinbo Wen, Linlin Liu, Frank Wuethner, Johannes Gierschner, Zengqi Xie
Summary: Nano-sized PBI dyes achieve deep-red emission and avoid common quenching pathways by tuning the dihedral angle between the aromatic and alkoxy groups.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Dong Won Kim, Kang-Hoon Choi, Seung Hwa Hong, Hyun-Sik Kang, Ji Eon Kwon, Sungjin Park, Byeong-Kwan An, Soo Young Park
Summary: The development of a new concept of hole transporting materials (HTMs) has led to the advancement of high-performing and stable perovskite solar cells (PSCs). Small molecular organic semiconductors, known for their reproducibility and easy synthesis, have been extensively studied for HTM. This research introduces a novel linear-type series of indoloindole (IDID)-based hole transporting materials, consisting of a fluorinated IDID core (IDIDF) and multiple thiophene rings. The structure-property relationship of the IDIDF derivatives is systematically investigated, resulting in the identification of an optimized material that exhibits improved solubility, favorable molecular packing patterns, and superior hole mobility. The champion PSCs using this optimal molecule, IDIDF2, achieve remarkable thermal and moisture stabilities, making them one of the highest performing n-i-p planar device configurations to date.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Siyang Feng, Liangxuan Wang, Begona Milian-Medina, Alfred J. Meixner, Min Sang Kwon, Soo Young Park, Reinhold Wannemacher, Johannes Gierschner
Summary: The complex photokinetics of donor-acceptor-donor triads with varying flexible spacer lengths were investigated. Both liquid and solid solutions, as well as crystals, were studied using fluorescence spectroscopy and computational analysis. The study revealed dynamic charge-transfer state formation in liquid solutions and fluorescent CT static complexes in solid solutions. It was also found that external stimuli could induce on/off fluorescence switching or change the emission color in films of the triads.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Zhiqiang Wang, Wenkui Wei, Liang Zeng, Tao Liu, Xiyue Yuan, Jiadong Zhou, Bingyan Yin, Junyu Li, Zengqi Xie, Fei Huang, Yong Cao, Chunhui Duan
Summary: This study reports the synthesis and application research of three A-DA & PRIME;D-A-type pentacyclic fullerene electron acceptors. Compared with the prevailing heptacyclic fullerene electron acceptors, these pentacyclic fullerene acceptors have lower synthetic complexity. Among them, the acceptor BTPT4F-BO exhibits a high power conversion efficiency of 15.0% in organic solar cells, with low synthetic complexity.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhibin Feng, Jiadong Zhou, Xiandong He, Bohan Wang, Guojing Xie, Xianfeng Qiao, Linlin Liu, Zengqi Xie, Yuguang Ma
Summary: Researchers have successfully developed two diradicals with super stability by increasing conjugation and electron-withdrawing effects, which expands the potential applications of organic spintronic devices.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Organic
Oliver Nagler, Kazutaka Shoyama, Olga Anhalt, Matthias Stolte, Rajeev K. Dubey, Zengqi Xie, Frank Wuerthner
Summary: This study reports a synthetic strategy to tune the structural and fluorescence properties of PBI dyes by employing a bay-substitution pattern. By introducing boron, carbon, or silicon atoms at the 1,12-positions and further functionalization, novel perylene dyes with excellent optical properties have been successfully synthesized.
ORGANIC CHEMISTRY FRONTIERS
(2023)
