Ferrocene-decorated hyperbranched poly[1,3,5-tri(aroycarbonyl)phenylene]s (hb-PTACPs) are prepared in moderate yields with high molecular weights by one-pot polycyclotrimerization of 4,4′-isopropylidenediphenyl bipropiolate with 4-(ferrocenylmethyl)phenyl propiolate in reflux dimethylformamide. All the polymers are soluble and film-forming. They enjoy high thermal stability and lost little of their weight when heated to 300 °C under nitrogen. Thin solid films of the organometallic polymers shows high refractive indices (RI = 1. 7038-1. 6295) in the wavelength region of 400-1,700 nm. Ceramization of the organometallic hb-PTACPs at high temperature under inert atmosphere gives iron nanoparticles with high magnetizabilities. The organometallic polymers are readily crosslinked under UV irradiation and pyrolysis of the patterned polymer films produces magnetic ceramic patterns with good shape retention.

Cathy K.W. Jim;Jacky W.Y. Lam;Anjun Qin;Chris W.T. Leung;Liu Jianzhao;Herman H.Y. Sung;Ian D. Williams;本忠 唐

Journal of Inorganic and Organometallic Polymers and Materials

2013

Polycyclotrimerizations of internal diynes (2,9-undecadiyne and 3,9-dodecadiyne) were carried out. Completely soluble hyperbranched poly(alkenephenylenes) were obtained under appropriate conditions and strict control. It was observed that the polymers are thermally stable and might possess interesting properties.

Kaitian Xu;Han Peng;Yi Huang;Zhongde Xu;本忠 唐

American Chemical Society, Polymer Preprints, Division of Polymer Chemistry

2000-8

A new strategy for synthesizing multisubstituted poly(naphthopyran)s (PNPs) with novel functionalities was described. The cascade oxidative polyannulation of benzoylacetonitrile and internal diynes are catalyzed by [RhCp∗Cl₂]₂ and Cu(II) acetate in dimethylformamide at 90 °C, generating PNPs with high molecular weight of up to 19 300 in excellent yields (isolation yield up to 96.4%). This polymerization method enjoys the remarkable advantages of high reaction rate, high efficiency, and atom-economy. All of the polymers show good solubility in common organic solvents and high thermal stability (degradation temperature up to 431°C). The thin films of PNPs display high refractive indices (1.5137-1.7524) in a wide wavelength range of 450-1600 nm. PNP containing tetraphenylethene units can be utilized to generate a well-resolved nanoscale photopattern by UV irradiation of its film through a copper mask. The PNPs exhibit the phenomena of mechanochromism and vapochromism: their emission is turned on upon scratching and solvent fuming their solid powders. Such attributes allow the polymers to be used as security materials or fluorescent indicators in various fields.

Yajing Liu;Zheng Zhao;Jacky W.Y. Lam;Yueyue Zhao;Yuncong Chen;Yong Liu;本忠 唐

Macromolecules

2015-7-14

Fluorescence techniques have been extensively employed to develop non-invasive methodologies for tracking and understanding complex biological processes both in vitro and in vivo, which is of high importance in modern life science research. Among a variety of fluorescent probes, inorganic semiconductor quantum dots (QDs) have shown advantages in terms of better photostability, larger Stokes shift and more feasible surface functionalization. However, their intrinsic toxic heavy metal components and unstable fluorescence at low pH greatly impede the applications of QDs in in vivo studies. In this work, we developed novel fluorescent probes that can outperform currently available QD based probes in practice. Using conjugated oligomer with aggregation-induced emission characteristics as the fluorescent domain and biocompatible lipid-PEG derivatives as the encapsulation matrix, the obtained organic dots have shown higher brightness, better stability in biological medium and comparable size and photostability as compared to their counterparts of inorganic QDs. More importantly, unlike QD-based probes, the organic fluorescent dots do not blink, and also do not contain heavy metal ions that could be potentially toxic when applied for living biosubstrates. Upon surface functionalization with a cell-penetrating peptide, the organic dots greatly outperform inorganic quantum dots in both in vitro and in vivo long-term cell tracing studies, which will be beneficial to answer crucial questions in stem cell/immune cell therapies. Considering the customized fluorescent properties and surface functionalities of the organic dots, a series of biocompatible organic dots will be developed to serve as a promising platform for multifarious bioimaging tasks in future.

Kai Li;本忠 唐;Bin Liu

2014

Doping-free white organic light-emitting diodes (DF-WO-LEDs) have aroused research interest because of their simple properties. However, to achieve doping-free hybrid WOLEDs (DFH-WOLEDs), avoiding aggregation-caused quenching is challenging. Herein, blue luminogens with aggregation-induced emission (AIE) characteristics, for the first time, have been demonstrated to develop DFH-WOLEDs. Unlike previous DFH-WOLEDs, both thin (<1 nm) and thick (>10 nm) AIE luminogen (AIEgen) can be used for devices, enhancing the flexibility. Two-color devices show (i) pure-white emission, (ii) high CRI (85), and (iii) high efficiency. Particularly, 19.0 lm W^1- is the highest for pure-white DF-WOLEDs, while 35.0 lm W^1- is the best for two-color hybrid WOLEDs with CRI ≥ 80. A three-color DFH-WOLED shows broad color-correlated temperature span (2301-11628 K), (i) the first sunlight-like OLED (2500-8000 K) operating at low voltages, (ii) the broadest span among sunlight-like OLED, and (iii) possesses comparable efficiency with the best doping counterpart. Another three-color DFH-WOLED exhibits CRI > 90 at ≥3000 cd m^-2, (i) the first DF-WOLED with CRI ≥ 90 at high luminances, and (ii) the CRI (92.8) is not only the highest among AIE-based WOLEDs but also the highest among DF-WOLEDs. Such findings may unlock an alternative concept to develop DFH-WOLEDs.

Baiquan Liu;Han Nie;Gengwei Lin;Shiben Hu;Dongyu Gao;Jianhua Zou;Miao Xu;Lei Wang;Zujin Zhao;Honglong Ning;俊彪 彭;Yong Cao;本忠 唐

ACS applied materials & interfaces

2017

An AIE-based fluorescent nanoprobe (MTPE-M) has been developed and used for ratiometric detection of hypochlorite with high selectivity and sensitivity. More importantly, its application in live cells and zebrafish for ratiometric imaging of endogenous ClO^- has also been achieved.

Yong Huang;Peisheng Zhang;Meng Gao;钫 曾;Anjun Qin;水珠 吴;本忠 唐

Chemical Communications

2016

In this paper, an AIE luminogen, which was used as a fluorescent probe, was synthesized and copolymerized with acrylate monomers to study the process of emulsion polymerization and properties of a fluorescent emulsion. At first, according to the changes in the fluorescence spectra, the emulsion polymerization process can be followed with real-time monitoring. Then, by varying the relative content of the AIE luminogen, the glass transition temperature of the synthesized emulsion, the size of the emulsion particle, the contents of the emulsion, and the detection temperature, etc., the relationship between the fluorescence properties and intrinsic properties of the emulsion was studied systematically. It should be pointed out that the microscopic motion of a segment of polymer can be studied by fluorescence spectra with the help of a fluorescent probe. Traditionally, AIE luminogens are applied in optoelectronics and biological domains as small organic molecules. When an AIE luminogen is connected with polymer chains by a chemical bond, a lot of interesting phenomena can be observed. The research results not only provide a new method to study the emulsion polymerization process and properties of emulsion, but also, the synthesized emulsion with properties of fluorescence may broaden the application of the AIE mechanism.

Shengyuan Yang;Wenjun Shen;Weili Li;Jijun Tang;Wei Yao;Jun Wang;美芳 朱;本忠 唐;国栋 梁;Zexiao Xu

RSC Advances

2016

Detection of organic pollutants in aqueous media is crucial for guaranteeing water safety. Conventional methods for organic pollutant detection suffer from time-consuming operation procedures (on the order of hours) and expensive devices. Inspired by dog noses, herein, we constructed self-assembled fluorescent nanosheets for rapid and sensitive detection of organic pollutants based on the grasp-report strategy. Tetraphenylethene decorated cyclodextrins (TPE-CDs) self-assembled into nanosheets with hydrophobic TPE layers sandwiched between two hydrophilic cyclodextrin layers. The hydrophobic cavity of the outer cyclodextrin layers grasped and collected organic pollutants, and subsequently transported them to the TPE layers and quenched the fluorescence emission of TPE layers. Such nanosheets allowed rapid detection of xylene (on the order of seconds) at a concentration of 5 μg/L. With the merits of the ease of synthesis, simple operation, and high sensitivity, the fluorescent nanomaterials provide a promising candidate for rapid and sensitive detection of organic pollutants.

国栋 梁;Feng Ren;海洋 高;青 伍;方明 祝;本忠 唐

ACS Sensors

2016

Twenty years ago, the concept of aggregation-induced emission (AIE) was proposed, and this unique luminescent property has attracted scientific interest ever since. However, AIE denominates only the phenomenon, while the details of its underlying guiding principles remain to be elucidated. This minireview discusses the basic principles of AIE based on our previous mechanistic study of the photophysical behavior of 9,10-bis(N,N-dialkylamino)anthracene (BDAA) and the corresponding mechanistic analysis by quantum chemical calculations. BDAA comprises an anthracene core and small electron donors, which allows the quantum chemical aspects of AIE to be discussed. The key factor for AIE is the control over the non-radiative decay (deactivation) pathway, which can be visualized by considering the conical intersection (CI) on a potential energy surface. Controlling the conical intersection (CI) on the potential energy surface enables the separate formation of fluorescent (CI:high) and non-fluorescent (CI:low) molecules [control of conical intersection accessibility (CCIA)]. The novelty and originality of AIE in the field of photochemistry lies in the creation of functionality by design and in the active control over deactivation pathways. Moreover, we provide a new design strategy for AIE luminogens (AIEgens) and discuss selected examples.

Satoshi Suzuki;Shunsuke Sasaki;Amir Sharidan Sairi;Riki Iwai;本忠 唐;Gen ichi Konishi

Angewandte Chemie - International Edition

2020-6-15

Youhong Tang;本忠 唐

2018-10-9