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Faraday Discussions

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https://www.readbyqxmd.com/read/27922140/construction-and-function-of-a-highly-efficient-supramolecular-luminescent-system
#1
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
https://www.readbyqxmd.com/read/27918604/real-time-naked-eye-multiplex-detection-of-toxins-and-bacteria-using-aiegens-with-the-assistance-of-graphene-oxide
#2
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
https://www.readbyqxmd.com/read/27918052/restorable-piezochromism-phenomenon-in-an-aie-molecular-crystal-combined-synchronous-raman-scattering
#3
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
https://www.readbyqxmd.com/read/27917419/polyurethanes-with-aggregation-enhanced-emission-characteristics-preparation-and-properties
#4
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
https://www.readbyqxmd.com/read/27906409/e-z-isomerization-solvatachromism-and-aggregation-induced-emission-enhancement-of-donor-acceptor-type-oligo-p-phenylene-vinylene-s
#5
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
https://www.readbyqxmd.com/read/27906385/structural-dynamics-general-discussion
#6
Piero Decleva, Andrew J Orr-Ewing, Markus Kowalewski, Oleg Kornilov, Jon P Marangos, Hans Jakob Wörner, Allan S Johnson, Ruaridh Forbes, Daniel Rolles, Dave Townsend, Oliver Schalk, Sebastian Mai, Tom J Penfold, R J Dwayne Miller, Martin Centurion, Kiyoshi Ueda, Wolfgang Domcke, Peter M Weber, Kyoung Koo Baeck, Oksana Travnikova, Chelsea Liekhus-Schmaltz, João Pedro Figueira Nunes, Daniel M Neumark, Oliver Gessner, Albert Stolow, Artem Rudenko, Pankaj Kumar Mishra, Adam Kirrander, Danielle Dowek, Fernando Martín, Ágnes Vibók, Michael P Minitti, Brian Stankus, Christian Burger
No abstract text is available yet for this article.
December 1, 2016: Faraday Discussions
https://www.readbyqxmd.com/read/27905612/bulky-4-6-disubstituted-tetraphenylethene-naphthalimide-dyad-synthesis-copolymerization-stimuli-responsive-fluorescence-and-cellular-imaging
#7
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
https://www.readbyqxmd.com/read/27904898/a-dual-photoluminescence-enhancement-system-stabilization-of-a-water-soluble-aiee-fluorogen-using-silver-nanowire
#8
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
https://www.readbyqxmd.com/read/27901544/quantitative-urinalysis-using-aggregation-induced-emission-bioprobes-for-monitoring-chronic-kidney-disease
#9
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
https://www.readbyqxmd.com/read/27901540/introductory-lecture-recent-research-progress-on-aggregation-induced-emission
#10
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
https://www.readbyqxmd.com/read/27901538/attosecond-processes-and-x-ray-spectroscopy-general-discussion
#11
Chris J Milne, Peter M Weber, Markus Kowalewski, Jon P Marangos, Allan S Johnson, Ruaridh Forbes, Hans Jakob Wörner, Daniel Rolles, Dave Townsend, Oliver Schalk, Sebastian Mai, Morgane Vacher, R J Dwayne Miller, Martin Centurion, Ágnes Vibók, Wolfgang Domcke, Raluca Cireasa, Kiyoshi Ueda, Filippo Bencivenga, Daniel M Neumark, Albert Stolow, Artem Rudenko, Adam Kirrander, Danielle Dowek, Fernando Martín, Misha Ivanov, Jan Marcus Dahlström, Nirit Dudovich, Shaul Mukamel, Alvaro Sanchez-Gonzalez, Michael P Minitti, Dane R Austin, Victor Kimberg, Zdenek Masin
No abstract text is available yet for this article.
November 30, 2016: Faraday Discussions
https://www.readbyqxmd.com/read/27901173/probing-the-nature-of-peripheral-boryl-groups-within-luminescent-tellurophenes
#12
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
https://www.readbyqxmd.com/read/27901160/vibrational-and-condensed-phase-dynamics-general-discussion
#13
Andrew J Orr-Ewing, Oleg Kornilov, Theis I Sølling, Theo Keane, Michael P Minitti, Hans Jakob Wörner, Oliver Schalk, Gareth M Roberts, Russell S Minns, Chris J Milne, Lukas Miseikis, Tom J Penfold, R J Dwayne Miller, Wolfgang Domcke, Martin Centurion, Kiyoshi Ueda, Peter M Weber, Oliver Gessner, Daniel M Neumark, Albert Stolow, Junko Yano, Shaul Mukamel, Vasilios G Stavros
No abstract text is available yet for this article.
November 30, 2016: Faraday Discussions
https://www.readbyqxmd.com/read/27901153/structure-activity-relationship-for-the-solid-state-emission-of-a-new-family-of-push-pull-%C3%AF-extended-chromophores
#14
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
https://www.readbyqxmd.com/read/27900386/all-or-none-switching-of-photon-upconversion-in-self-assembled-organogel-systems
#15
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
https://www.readbyqxmd.com/read/27900385/aggregation-enhanced-emission-active-tetraphenylbenzene-cored-efficient-blue-light-emitter
#16
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
https://www.readbyqxmd.com/read/27900378/mesogenic-gold-complexes-showing-aggregation-induced-enhancement-of-phosphorescence-in-both-crystalline-and-liquid-crystalline-phases
#17
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
https://www.readbyqxmd.com/read/27900376/development-of-solid-state-emissive-o-carboranes-and-theoretical-investigation-of-the-mechanism-of-the-aggregation-induced-emission-behaviors-of-organoboron-element-blocks
#18
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
https://www.readbyqxmd.com/read/27900375/aie-phenomena-of-a-cyanostilbene-derivative-as-a-probe-of-molecular-assembly-processes
#19
Fuyuki Ito, Jun-Ichi Fujimori, Narumi Oka, Michel Sliwa, Cyril Ruckebusch, Syoji Ito, Hiroshi Miyasaka
The initial processes of the crystallization of a solute molecule, 1-cyano-trans-1,2-bis-(4'-methylbiphenyl)-ethylene (CN-MBE) in binary solution (water and acetone), were investigated by means of fluorescence spectroscopy as well as scanning electron microscopy (SEM). With an increase in the volume fraction (Vw) of the poor solvent (water) in the solution, a drastic change in the fluorescence spectra and intensity of CN-MBE was observed. This change was attributed to aggregation induced emission (AIE). By analyzing the evolution of AIE by multivariate curve resolution-alternating least squares (MCR-ALS), it was revealed that four main species appeared in the solution depending on the Vw values...
November 30, 2016: Faraday Discussions
https://www.readbyqxmd.com/read/27898115/tetraphenylethylene-derivative-capped-ch3nh3pbbr3-nanocrystals-aie-activated-assembly-into-superstructures
#20
Feng Zhang, Tianye Zhou, Guogang Liu, Jianbing Shi, Haizheng Zhong, Yuping Dong
The surfaces of semiconductor nanocrystals have been known to be a very important factor in determining their optical properties. The introduction of functionalized ligands can further enhance the interactions between nanocrystals, which is beneficial for the assembly of nanocrystals. In a previous report, we developed a ligand-assisted reprecipitation method to fabricate organometal halide perovskite nanocrystals capped with octylamine and oleic acid. Here, a TPE derivative 3-(4-(1,2,2-triphenylvinyl)phenoxy)propan-1-amine, which shows a typical aggregation induced emission feature, is applied to replace octylamine to fabricate CH3NH3PbBr3 nanocrystals...
November 29, 2016: Faraday Discussions
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