Article
Chemistry, Multidisciplinary
Lin Ai, Ziqi Song, Mingjun Nie, Jingkun Yu, Fukang Liu, Haoqiang Song, Biao Zhang, Geoffrey I. N. Waterhouse, Siyu Lu
Summary: Carbon dots (CDs) with color-tunable solid-state fluorescence (SSF) were obtained through surface ligand modulation, enabling emission wavelengths to be switched smoothly by altering conjugation ability. Three-dimensional printing was used to create a range of emissive objects, demonstrating the commercial potential for use in optical lamps.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Derya Ozyurt, Sunil Shafqat, Tuula T. Pakkanen, Rosalie K. Hocking, Adrian Mouritz, Bronwyn Fox
Summary: By controlling the degree of aggregation, nitrogen-doped graphene quantum dots exhibit various emission colors, including blue, cyan, and greenish yellow. Moreover, for the first time, this study reveals that N-GQDs film can display yellow and orange emissions under 365 nm UV light.
Article
Chemistry, Multidisciplinary
Siqi Wei, Haoyi Li, Xinghang Yin, Qiang Yang, Anli Chen, Renjie Li, Jing Wang, Rui Yang
Summary: The study successfully synthesized high-efficiency red carbon dots using a solvothermal method, identifying the larger sp(2) conjugated domains of the carbon core and the high content of graphitic N as key factors for red fluorescence. Surface groups also play a role in red emission through the formation of the N, O-related defect state.
NEW JOURNAL OF CHEMISTRY
(2021)
Review
Chemistry, Inorganic & Nuclear
Wenjun Xu, Fanhao Zeng, Qiurui Han, Zhili Peng
Summary: In this review, recent developments in the preparation and application of solid-state emissive carbon dots are summarized and discussed. The advantages, challenges, and prospects of solid-state emissive carbon dots are also proposed.
COORDINATION CHEMISTRY REVIEWS
(2024)
Article
Chemistry, Multidisciplinary
Ming Hu, Feng-Ying Ye, Cong Du, Weizhou Wang, Wei Yu, Minghua Liu, Yan-Song Zheng
Summary: New hindered tetraphenylethylene (TPE) helicates with substitutions at 2,6-position of phenyl rings were designed and synthesized. These TPE helicates emit strong deep-blue to violet fluorescence and exhibit high enantioselective recognition of chiral tartaric acid and its derivatives, showing potential applications in fluorescent emission, circularly polarized luminescence, and chiral recognition. The derived tetramines possess unprecedented planar structure with sp(2)-hybridized nitrogen, leading to the interplay between aggregation-induced emission (AIE) effect and aggregation-caused quenching (ACQ) phenomenon through photoinduced electron transfer (PET), making them promising chiral materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Multidisciplinary Sciences
Faiza Sajjad, Yi-Jia Yan, Davor Margetic, Zhi-Long Chen
Summary: This study successfully achieved one-pot synthesis of the conjugate of red emission carbon-based polymer and pyropheophorbide-alpha, and investigated their photophysical properties and structural characteristics. The pH-sensitivity of the conjugates was confirmed, and the photo toxicity and dark toxicity were evaluated in human esophageal cancer cell line. The hemocompatibility of the synthesized conjugates was also evaluated.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Yanfei Qu, Xuewei Bai, Di Li, Xiaoyu Zhang, Chao Liang, Weitao Zheng, Songnan Qu
Summary: Carbon dots (CDs) are promising luminescent materials for optoelectronic applications due to their low cost, eco-friendliness, and color-tunable photoluminescence (PL). However, the research on solid-state emissive CDs is limited by aggregation-caused quenching (ACQ) and poor film-formation ability. In this study, CDs functionalized with branched-polyethylenimine (b-PEI) were synthesized to overcome the ACQ effect and exhibit efficient red and NIR emission in an aggregate state. The designed CDs also demonstrated good film-formation ability, which enhances their value for film-based optoelectronic devices.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yingfang Tao, Jie Lin, Deyin Wang, Yuhua Wang
Summary: A new type of carbon dots capable of emitting blue and cyan light in aqueous and solid states respectively have been synthesized using a simple hydrothermal method. The change in emission properties of solid state carbon dots is attributed to surface state change caused by aggregation, which can be stabilized by surface functionalization with Na+ ions. Proof-of-concept study shows the potential application of these carbon dots in anti-counterfeiting inks and high quality printing of fluorescent images.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Xinli Wang, Liwei Chen, Renfu Li, Zuoxu Xie, Ming Hu, Shitao Sun, Zhenli Li, Jinle Hao, Bin Lin, Xueyuan Chen, Lijun Xie
Summary: In this study, a convenient conversion from aggregation-caused quenching (ACQ) to aggregation-induced emission (AIE) was achieved using an efficient regioisomerization strategy. Two regioisomers of rofecoxib derivatives, PYR2 and PYR4, were found to exhibit significantly different fluorescent properties. Compound PYR2 showed polymorphism, reversible mechanochromic luminescence, and acidochromic properties.
Article
Polymer Science
Shunsuke Ohtani, Natsumi Yamada, Masayuki Gon, Kazuo Tanaka, Yoshiki Chujo
Summary: The study showed that the elimination of alkyl side chains on bithiophene units led to a significant red shift in the emission spectra of conjugated polymers, with the enhancement of planarity between two thiophene rings playing a role in this spectral red shift. Moreover, a drastic red shift in emission (approximately 40 nm) was observed during vapor annealing in films, without a loss of emission efficiency.
Review
Chemistry, Multidisciplinary
Haolin Wang, Lin Ai, Haoqiang Song, Ziqi Song, Xue Yong, Songnan Qu, Siyu Lu
Summary: Carbon dots (CDs) are carbon nanoparticles smaller than 10 nm, which have excellent optical properties. However, high-performing CDs often suffer from aggregation-induced quenching in the solid state, hindering their commercial applicability. This article reviews recent advances in strategies and mechanisms for achieving solid-state fluorescence in CDs, as well as methods to tune their optical properties. The article also discusses the latest applications of CDs in optoelectronics, biology, and sensing, and considers the prospects and challenges in the development of solid-state fluorescence in CDs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Analytical
Chang-Sheng Guo, Xiao-Long Su, Yu-Ting Yin, Bo-Xuan Zhang, Xin-Yi Liu, Rui-Peng Wang, Pu Chen, Hai-Tao Feng, Ben-Zhong Tang
Summary: Mechanochromic organic molecules have great potential as smart materials for optical recording and memory devices. In this study, a series of cyanostilbene-based AIEgens were synthesized to investigate the influence of morphology transformation and push-pull electronic effect on the luminescence properties. It was found that loose molecular packing is crucial for achieving high-contrast luminescence.
Article
Chemistry, Inorganic & Nuclear
Peng Zhang, Wanying Xie, Zhenbin Wang, Zenggang Lin, Xiuxiang Huang, Zhenghua Ju, Weisheng Liu
Summary: This study demonstrates the time-dependent dynamic multicolor afterglow of LiGa5O8:Eu3+/Tb3+ phosphors, which can be applied in high-security anticounterfeiting and encryption applications.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Inorganic & Nuclear
Myung-Ho Choi, Tae Hwan Moon, Yunseung Kuk, Kang Min Ok
Summary: Reported here is the green and red photoluminescence of two manganese bromide complexes derived from different secondary interactions of aminomethylpyridine isomers. The two positional isomers, 4-amino-3-methylpyridine and 3-amino-5-methylpyridine, produce protonated forms under acidic conditions, forming different hydrogen bonding networks and resulting in different coordination environments. Single-crystal structure analysis revealed different manganese halide units emitting light in the green and red regions.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Wen-Kai Fang, Si-Hui Zhou, Da Liu, Liu Liu, Li-Ling Zhang, Da-Di Xu, Yu-Yao Li, Meng-Han Liu, Hong-Wu Tang
Summary: It is significant to confirm the luminescence mechanism of carbon polymer dots for developing applications. The emission of carbon polymer dots is derived from molecular luminescence related to hydrogen bond effects, and the luminescence is mainly affected by hydrogen bonds between the surface groups of carbon polymer dots and the solvent molecules. Carbon polymer dots can be used for the detection of trace water in organic solvents and for multi-color cell imaging.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jae-Min Jeong, Heon Gyu Kang, Hyung-Jin Kim, Seok Bok Hong, Hyeonyeol Jeon, Sung Yeon Hwang, Donghyuk Seo, Byeong Eun Kwak, Young-Kyu Han, Bong Gill Choi, Do Hyun Kim
ADVANCED FUNCTIONAL MATERIALS
(2018)
Article
Chemistry, Physical
Jae-Min Jeong, Se Bin Jin, Jo Hee Yoon, Jae Goo Yeo, Geun Young Lee, Mobina Irshad, Seongwoo Lee, Donghyuk Seo, Byeong Eun Kwak, Bong Gill Choi, Do Hyun Kim, Jung Won Kim
Article
Chemistry, Physical
Hyo Jeong Yoo, Byeong Eun Kwak, Do Hyun Kim
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Polymer Science
Byeong Eun Kwak, Hyo Jeong Yoo, Eungjun Lee, Do Hyun Kim
Summary: The demand for polymer nanofiber webs is increasing due to their high capture efficiency and strong droplet-blocking ability. The centrifugal multispinning system shows potential for mass production of polymer nanofibers with cospinning ability. By adjusting the relative amounts of different fibers, the multicomponent nanofiber web's properties can be controlled for functional textile applications.
Article
Nanoscience & Nanotechnology
Byeong Eun Kwak, Hyo Jeong Yoo, Do Hyun Kim
Summary: Researchers synthesized carbon dots with high quantum yield and narrow emission, but their fluorescence was completely quenched in the solid state. By encapsulating CDs in silica matrices, solid-state quenching was avoided, demonstrating the potential of CDs as fluorescent ink for optoelectronic applications.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Hyo Jeong Yoo, Byeong Eun Kwak, Do Hyun Kim
Summary: This study investigates the impact of the pi-conjugated domain on the photoluminescence (PL) phenomenon of carbon dots (CDs) under different interparticle separation conditions, using three types of CDs with varying degrees of carbonization achieved by solvothermal reactions in different alcoholic solvents. At low dispersion, CDs from different solvents exhibit two emissive centers with varying relative intensities based on the degree of carbonization. The higher pi-conjugated domain content in CDs leads to a shift in the dominant PL center from surface- to core-state as CD concentration increases.
Article
Chemistry, Physical
Hyo Jeong Yoo, Byeong Eun Kwak, Do Hyun Kim
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
