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Faraday Discussions

Santosh Kumar Behera, Anwesha Murkherjee, G Sadhuragiri, Palani Elumalai, M Sathiyendiran, Manishekhar Kumar, Biman B Mandal, G Krishnamoorthy
The inner filter effect due to self-quenching dominates the normal emission of dyes at higher concentrations, which would limit their applications. Since normal emission was also observed with aggregation induced emission enhancement (AIEE) active excited state intramolecular proton transfer (ESIPT) exhibiting molecules, two new molecules are synthesized and studied to obtain normal emission free AIEE. The molecules are 4-(3-(benzo[d]thiazol-2-yl)-5-tert-butyl-4-hydroxybenzyl)-2-(benzo[d]thiazol-2-yl)-6-tert-butyl phenol (bis-HPBT) and its oxazole analogue (bis-HPBO)...
December 12, 2016: Faraday Discussions
Gonzalo Angulo, Raymond Dean Astumian, Vijay Beniwal, Peter G Bolhuis, Christoph Dellago, John Ellis, Bernd Ensing, David R Glowacki, Sharon Hammes-Schiffer, Johannes Kästner, Tony Lelièvre, Nancy Makri, David Manolopoulos, Georg Menzl, Thomas F Miller, Adrian Mulholland, Ewa Anna Oprzeska-Zingrebe, Michele Parrinello, Eli Pollak, Jonny Proppe, Markus Reiher, Jeremy Richardson, Priyadarshi Roy Chowdhury, Eduardo Sanz, Christof Schütte, Dmitry Shalashilin, Rafał Szabla, Srabani Taraphder, Ambuj Tiwari, Eric Vanden-Eijnden, Adithya Vijaykumar, Kirill Zinovjev
No abstract text is available yet for this article.
December 8, 2016: Faraday Discussions
Stuart Althorpe, Gonzalo Angulo, Raymond Dean Astumian, Vijay Beniwal, Peter G Bolhuis, João Brandão, John Ellis, Wei Fang, David R Glowacki, Sharon Hammes-Schiffer, Timothy J H Hele, Hannes Jónsson, Tony Lelièvre, Nancy Makri, David Manolopoulos, Alexander M Mebel, Georg Menzl, Thomas F Miller, Michele Parrinello, Pablo M Piaggi, Eli Pollak, Priyadarshi Roy Chowdhury, Eduardo Sanz, Dmitry Shalashilin, Egill Skúlason, Riccardo Spezia, Srabani Taraphder
No abstract text is available yet for this article.
December 8, 2016: Faraday Discussions
Stuart C Althorpe, Nandini Ananth, Gonzalo Angulo, Raymond Dean Astumian, Vijay Beniwal, Jochen Blumberger, Peter G Bolhuis, Bernd Ensing, David R Glowacki, Scott Habershon, Sharon Hammes-Schiffer, Timothy J H Hele, Nancy Makri, David E Manolopoulos, Laura K McKemmish, Thomas F Miller Iii, William H Miller, Adrian J Mulholland, Tatiana Nekipelova, Eli Pollak, Jeremy O Richardson, Martin Richter, Priyadarshi Roy Chowdhury, Dmitry Shalashilin, Rafał Szabla
No abstract text is available yet for this article.
December 8, 2016: Faraday Discussions
Jiaqi Tong, Ting Hu, Anjun Qin, Jing Zhi Sun, Ben Zhong Tang
The binding behaviours of a transport protein, bovine serum albumin (BSA), in its native, unfolding and refolding states have been probed by monitoring the emission changes of two exogenous AIE-active fluorescent probes, M2 and M3, which are designed to be anionic and cationic, respectively. Due to their AIE properties, both M2 and M3 display emission enhancement when bound to the hydrophobic cavity of BSA. The binding site of M2 and M3 is found to be subdomain IIA. Then, the BSA + M2 and BSA + M3 systems are utilized to fluorescently signal the conformation changes of BSA caused by various external stimuli, including thermally or chemically induced denaturation...
December 8, 2016: Faraday Discussions
Yingjie Liu, Suqian Ma, Bin Xu, Wenjing Tian
Aggregation-induced emission (AIE) provides a new way of achieving highly efficient luminescent materials. In this contribution, the self-assembly behavior, molecular stacking structure and photophysical properties of two polymorphs of a supramolecular co-crystal (C1 and C2) are investigated. The block-like crystal C1, packed in segregated stacking with strong π-π interactions between the H and G molecules, shows weak green emission with a low efficiency (ΦF) of 2%. In comparison, the needle-like crystal C2, packed in segregated stacking with no obviously strong intermolecular interactions, shows bright yellow emission...
December 6, 2016: Faraday Discussions
Ruoyu Zhang, Xiaolei Cai, Guangxue Feng, Bin Liu
Toxins and bacteria in water or food pose a threat to human life and could potentially be exploited for bioterrorism. Real-time naked-eye detection of these contaminants is highly desirable to provide a direct and simple analytical method and address the challenges of the existing strategies. Using the detection of ricin and B. subtilis as an example, a naked-eye multiplex detection model is established. In this work, a green fluorogen with aggregation-induced emission (AIE) characteristics was encapsulated in silica nanoshells...
December 5, 2016: Faraday Discussions
Liqun Liu, Kai Wang, Jian Deng, Zhe Zhang, Yan Wang, Yuguang Ma
Many AIE active molecules have been designed and synthesized, and have been found to possess many interesting characteristics. In recent years, research into AIE crystals has increased, and it has been clearly shown that the piezochromic effect of AIE crystals depends on their structure. While most of the related research has given qualitative results, to quantitatively reveal molecular conditions under different pressure conditions, crystals of an AIE material (2Z,2'Z)-3,3'-(1,4-phenylene)bis(2-(naphthalen-2-yl)acrylonitrile) were investigated by synchronous Raman scattering and fluorescence spectroscopies...
December 5, 2016: Faraday Discussions
Kun Wang, Jiping Yang, Chen Gong, Hao Lu
An amino-terminated poly(propylene glycol)-modified tetraaryl-buta-1,3-diene derivative (TABDAA) was introduced to synthesize polyurethanes with different ratios of soft/hard segments. A mixture of TABDAA and poly(tetrahydrofuran) 1000 as the soft segments was reacted with 4,4-diphenylmethane diisocyanate and 1,4-butanediol as the hard segments in molar ratios of 1 : 2 : 1, 2 : 3 : 1, and 3 : 4 : 1 to give the desired polyurethanes named TMPU-211, TMPU-321 and TMPU-431, respectively...
December 5, 2016: Faraday Discussions
Cunfang Feng, Jinyu Li, Xiao Han, Xin He, Liqun Liu, Xiaoxiao Li, Xiaoyi Sun, Ping Lu, Yuguang Ma
A donor-acceptor molecule, PICNDSB, with cyclopenta[b]indole as the donor and (1,4-phenylene)bis(3-phenylacrylonitrile) as the acceptor, is designed and synthesized. PICNDSB shows typical aggregation-induced emission characteristics. The photoluminescence quantum yield of PICNDSB in dilute THF was only 0.7% and reaches 51.4% in the solid state. Compared with its analogue CzCNDSB, PICNDSB possesses stronger intramolecular charge transfer properties, as revealed from CV measurements, theoretical calculations, and their fluorescence behaviors...
December 1, 2016: Faraday Discussions
Qiong-Xin Hua, Bo Xin, Jun-Xia Liu, Ling-Xi Zhao, Zu-Jing Xiong, Tao Chen, Ze-Qiang Chen, Chong Li, Wen-Liang Gong, Zhen-Li Huang, Ming-Qiang Zhu
We report the design and synthesis of a tetraphenylethene substituted with naphthalimide at the 4, 6 positions, named NI-2TPE. NI-2TPE exhibits strong solvent-dependent emission properties with combined ICT and AIE characteristics in THF-H2O systems. This probe was used directly on test papers to distinguish normal organic solvents using their emission colours under UV light based on its AIE and ICT nature. Thanks to the vinyl group in NI-2TPE, we synthesized a copolymer of NIPAM and NI-2TPE, termed P(NIPAM-co-NI-2TPE)...
December 1, 2016: Faraday Discussions
Ying-Chen Chiang, Chun-Ta Huang, Wei Hsin Wang, Cheng-Chung Chang
This manuscript describes the preparation of water soluble aggregation-induced emission enhancement (AIEE)-based fluorescent organic nanoparticles (FONs). The fluorescence diversity of the FONs was investigated in the presence of silver nanowires. We observed that the emission of the FONs can be enhanced by mixing with the nanowires, which is believed to originate from resonance between the emission of the FONs and the surface plasmon resonances of the metal surface. That is, the AIEE phenomenon was promoted according to the metal-enhanced fluorescence (MEF) mechanism that can be used to build up a novel double emission enhancement (DEE) platform and to extend the range of AIEE applications...
December 1, 2016: Faraday Discussions
Tong Chen, Ni Xie, Lucia Viglianti, Yabin Zhou, Hui Tan, Ben Zhong Tang, Youhong Tang
Early detection and appropriate management of chronic kidney disease can reduce the progression of kidney failure and cardiovascular disease. The urine albumin to creatinine ratio (UACR) test is a standard urine test for identifying individuals at high risk of developing progressive kidney disease. In this study, IDATPE, a novel fluorescent probe with aggregation-induced emission (AIE) features, is successfully developed for creatinine detection and quantitation. An excellent correlation between fluorescent light intensity and creatinine concentration is achieved...
November 30, 2016: Faraday Discussions
Yuancheng Wang, Guanxin Zhang, Meng Gao, Yuanjing Cai, Chi Zhan, Zujin Zhao, Deqing Zhang, Ben Zhong Tang
Since the discovery of the aggregation-induced emission (AIE) phenomenon in 2001, research on AIE molecules has drawn much attention, and this area has been expanding tremendously. This brief review will focus on recent advances in the science and application of AIE molecules, including new mechanistic understanding, new AIE molecules for sensing and imaging, stimuli-responsive AIE molecules and applications of AIE molecules for OLEDs. Moreover, this review will give a perspective on the possible opportunities and challenges that exist in the future for this area...
November 30, 2016: Faraday Discussions
Christina A Braun, Derek Zomerman, Inara de Aguiar, Yanyu Qi, William Torres Delgado, Michael J Ferguson, Robert McDonald, Gabriel L C de Souza, Gang He, Alex Brown, Eric Rivard
In this article our attempts to tune the color of luminescence within a new class of aggregation-induced emission (AIE) active tellurophenes is reported along with computational details that include spin-orbit coupling effects so as to better understand the nature of emission in the phosphorescent tellurophene (B-Te-6-B). Despite not meeting some of the initial synthetic targets, the emission within a borylated tellurophene can be altered with the addition of an N-heterocyclic carbene.
November 30, 2016: Faraday Discussions
Andrea Nitti, Francesca Villafiorita-Monteleone, Aurora Pacini, Chiara Botta, Tersilla Virgili, Alessandra Forni, Elena Cariati, Massimo Boiocchi, Dario Pasini
We report the design, synthesis, molecular optical properties, and solid state emissive behaviour of a series of novel compounds, which, similar to the archetypal AIE luminogen tetraphenylethene, are formed of a central olefin stator and decorated with either three or four rotors. These rotors, being either electron-rich substituted benzenes, or electron-withdrawing functional groups (esters, ketones, cyano groups) confer a "push-pull" character to the overall molecular structure. Building on both new and already published contributions, a comprehensive picture of the properties and the potential of these compounds is provided...
November 30, 2016: Faraday Discussions
Pengfei Duan, Deepak Asthana, Takuya Nakashima, Tsuyoshi Kawai, Nobuhiro Yanai, Nobuo Kimizuka
Aggregation-induced photon upconversion (iPUC) based on a triplet-triplet annihilation (TTA) process is successfully developed via controlled self-assembly of donor-acceptor pairs in organogel nanoassemblies. Although segregation of donor from acceptor assemblies has been an outstanding problem in TTA-based UC and iPUC, we resolved this issue by modifying both the triplet donor and aggregation induced emission (AIE)-type acceptor with glutamate-based self-assembling moieties. These donors and acceptors co-assemble to form organogels without segregation...
November 30, 2016: Faraday Discussions
Lingzhi Li, Han Nie, Ming Chen, Jingzhi Sun, Anjun Qin, Ben Zhong Tang
A tetraphenylbenzene (TPB) cored luminophore of TPB-AC with aggregation-enhanced emission characteristics was designed and synthesized. TPB-AC could be potentially applied for the fabrication of high performance organic light-emitting diodes (OLEDs) with blue light emission.
November 30, 2016: Faraday Discussions
Shigeyuki Yamada, Yuki Rokusha, Ryo Kawano, Kaori Fujisawa, Osamu Tsutsumi
Mesogenic Au complexes with a biphenyl core were synthesized as new AIEgens, and their thermodynamic and photophysical properties were discussed. Similar to Au complexes with a phenyl core which have been reported previously, the complexes with a short alkoxy chain formed dimers in the crystal form. However, the complexes with a long alkoxy chain formed two-dimensional layer structures through multiple intermolecular interactions in both the crystalline and liquid-crystalline (LC) phases. The present Au complexes showed a high thermochemical stability against thermal decomposition and a high thermodynamic stability of the LC phase...
November 30, 2016: Faraday Discussions
Kazuo Tanaka, Kenta Nishino, Shunichiro Ito, Honami Yamane, Kazumasa Suenaga, Kazushi Hashimoto, Yoshiki Chujo
This paper presents the aggregation-induced emission (AIE) properties of o-carborane derivatives and proposes a potential strategy for constructing AIE-active organoboron complexes via the enhancement of freedom of intramolecular mobility. Initially, the optical properties of o-carborane derivatives with or without the fused ring structure at the C-C bond in o-carborane in which elongation should be induced by photo-excitation according to theoretical calculations were compared. Accordingly, it was shown that large mobility at the C-C bond in o-carborane should be responsible for the annihilation of emission in solution, leading to the AIE property...
November 30, 2016: Faraday Discussions
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