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Dive into the research topics where Hongwei Tan is active.

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Featured researches published by Hongwei Tan.


Journal of the American Chemical Society | 2016

Vapochromic Behavior of a Chair-Shaped Supramolecular Metallacycle with Ultra-Stability

Bo Jiang; Jing Zhang; Jian-Qiu Ma; Wei Zheng; Li-Jun Chen; Bin Sun; Chao Li; Bing-Wen Hu; Hongwei Tan; Xiaopeng Li; Hai-Bo Yang

A new discrete supramolecular metallacycle functionalized with an alkynylplatinum(II) bzimpy moiety was successfully prepared via coordination-driven self-assembly, and it displayed a reversible color change in the solid state between yellow and red, triggered by CH2Cl2 vapor or mechanical grinding. Notably, unlike many known vapochromic systems, the obtained vapochromic metallacycle exhibits ultra-stability, with the red color remaining unchanged in air for several months at room temperature or even under vacuum for >1 week. Further investigation revealed that the chair conformation of the metallacyclic scaffold, which was thought to prevent intermolecular steric repulsion between the alkyl chain and triethylphosphine, favored close molecular stacking through intermolecular Pt···Pt and π-π stacking interactions, thus allowing such vapochromic behavior with ultra-stability.


Journal of Organic Chemistry | 2012

Design and Construction of Endo-Functionalized Multiferrocenyl Hexagons via Coordination-Driven Self-Assembly and Their Electrochemistry

Li-Jun Chen; Quan-Jie Li; Jiuming He; Hongwei Tan; Zeper Abliz; Hai-Bo Yang

The construction of a new family of endo-functionalized multiferrocenyl hexagons with various sizes via coordination-driven self-assembly is described. The structures of these novel metallacycles, containing several ferrocenyl moieties at their interior surface, are characterized by multinuclear NMR ((31)P and (1)H) spectroscopy, cold-spray ionization mass spectrometry (CSI-TOF-MS), elemental analysis, and molecular modeling. Insight into the structural and electrochemical properties of these endo-functionalized multiferrocenyl hexagons was obtained through cyclic voltammetry investigation.


Journal of Organic Chemistry | 2011

Design and Synthesis of 60° Dendritic Donor Ligands and Their Coordination-Driven Self-Assembly into Supramolecular Rhomboidal Metallodendrimers

Qing Han; Quan-Jie Li; Jiuming He; Bingjie Hu; Hongwei Tan; Zeper Abliz; Cui-Hong Wang; Yihua Yu; Hai-Bo Yang

The design and self-assembly of novel rhomboidal metallodendrimers via coordination-driven self-assembly is described. By employing newly designed 60° ditopic donor linkers substituted with Fréchet-type dendrons and appropriate 120° rigid di-Pt(II) acceptor subunits, a variety of [G-1]-[G-3] rhomboidal metallodendrimers with well-defined shape and size were prepared under mild conditions in high yields. The supramolecular metallodendrimers were characterized with multinuclear NMR ((1)H and (31)P), mass spectrometry (CSI-TOF-MS), and elemental analysis. Isotopically resolved mass spectrometry data support the existence of the metallodendrimers with rhomboidal cavities, and NMR data were consistent with the formation of all ensembles. The shape and size of all rhomboidal metallodendrimers were investigated with the PM6 semiempirical molecular orbital method.


Chemistry: A European Journal | 2015

Coordination-Driven Self-Assembly of Carbazole-Based Metallodendrimers with Generation-Dependent Aggregation-Induced Emission Behavior

Wen‐Jia Fan; Bin Sun; Jian-Qiu Ma; Xiaopeng Li; Hongwei Tan; Lin Xu

A new family of 120° carbazole-based dendritic donors D1-D3 have been successfully designed and synthesized, from which a series of novel supramolecular carbazole-based metallodendrimers with well-defined shapes and sizes were successfully prepared by [2+2] and [3+3] coordination-driven self-assembly. The structures of newly designed rhomboidal and hexagonal metallodendrimers were characterized by multinuclear NMR ((1) H and (31) P) spectroscopy, ESI-TOF mass spectrometry, FTIR spectroscopy, and the PM6 semiempirical molecular orbital method. The fluorescence emission behavior of ligands D1-D3, rhomboidal metallodendrimers R1-R3, and hexagonal metallodendrimers H1-H3 in mixtures of dichloromethane and n-hexane with different n-hexane fractions were investigated. The results indicated that D1-D3 featured typical aggregation-induced emission (AIE) properties. However, different from ligands D1-D3, metallodendrimers R1-R3 and H1-H3 presented interesting generation-dependent AIE properties. Furthermore, evidence for the aggregation of these metallodendrimers was confirmed by a detailed investigation of dynamic light-scattering, Tyndall effect, and SEM. This research not only provides a highly efficient strategy for constructing carbazole-based dendrimers with well-defined shapes and sizes, but also presents a new family of carbazole-based dendritic ligands and rhomboidal and hexagonal metallodendrimers with interesting AIE properties.


RSC Advances | 2014

Branched platinum–acetylide complexes: synthesis, properties, and their aggregation behavior

Jing Zhang; Nai-Wei Wu; Xing-Dong Xu; Quan-Jie Li; Cui-Hong Wang; Hongwei Tan; Lin Xu

A new branched platinum–acetylide complex PP6 containing pyrene as the main skeleton, pentiptycene units as bridges, and long alkyl chains as branches was successfully synthesized. The structure of PP6 was well characterized by 1H NMR, 31P {1H} NMR, MALDI-TOF-MS spectrometry, and the semiempirical PM6 method. The investigation of the absorption and emission spectra of PP6 and the model complexes revealed that the introduction of iptycene was beneficial to improve the emission efficiency. More importantly, PP6 was aggregated into ordered microspheres driven by the hydrophobic/hydrophilic interactions. The morphologies of the microspheres were investigated by SEM, TEM, LSCM, and EDX. Furthermore, the morphologies and the sizes of the microscale aggregates could be changed by altering the iptycene moiety or the hydrophobic units in PP6.


RSC Advances | 2016

A single chemosensor for bimetal Cu(II) and Zn(II) in aqueous medium

Zhuang Liao; Dan Wang; Jian-Quan Zheng; Hongwei Tan; Xiang-Jun Zheng; Lin-Pei Jin

A new quinazoline derivative 6-(4-diethylamino)phenol-2-yl-(5,6-dihydrobenzimidazo[1,2-c])-quinazoline (HL) and the two metal Schiff-base complexes [CuL1Cl]·CH3OH (1) and [ZnL1(Ac)]·0.5CH3CH(OH)CH3 (2) (HL1 = 4-{[2-(1H-benzoimidazol-2-yl)-phenyl imino]-methyl}-benzene-1-diethylamino-3-ol) were synthesized and characterized by single-crystal X-ray diffraction. HL is highly selective and sensitive to Cu(II) and Zn(II) ions in aqueous medium with a detection limit of 2.13 × 10−6 and 7.19 × 10−7 M for Cu2+ and Zn2+, respectively. HL can act as a “turn-off” sensor for Cu(II) with the excitation wavelength of 356 nm and a “turn-on” sensor for Zn(II) when excited at 416 nm. The Job plots, fluorescence and UV-vis titrations, 1H NMR as well as ESI data show that the binding stoichiometry of Cu(II)/Zn(II) with HL is 1 : 1. The binding sites of HL with Cu(II)/Zn(II) are two nitrogen atoms and one oxygen atom, forming Cu(II)–L1 and Zn(II)–L1 complexes. This agrees with the crystal structures of 1 and 2.


Polymer Chemistry | 2017

Peripherally diketopyrrolopyrrole-functionalized dendritic oligothiophenes – synthesis, molecular structure, properties and applications

Wei Gao; Qun Luo; Junkai Wang; Yi Lin; Changquan Tang; Junyan Dou; Hongwei Tan; Qingdong Zheng; Chang-Qi Ma; Zheng Cui

Three-dimensional π-conjugated dendrimers are a class of structure defined macromolecules for use in organic electronics. Herein, a new family of dendritic oligothiophenes (DOT-p-DPPs) that are functionalized with the diketopyrrolopyrrole group at the periphery were synthesized by a precise stepwise approach. The chemical structure and the monodisperse nature of these DOT-p-DPPs were confirmed by NMR, MALDI-TOF MS, HR MS, and GPC measurements. UV-vis absorption and fluorescence spectra and cyclic voltammetry data of these compounds were also measured. Small band gaps (∼1.8 eV) and almost identical HOMO/LUMO energy levels (−5.2/−3.5 eV) were measured for these DOT-p-DPPs independent of the molecular size. However, the molecular molar extinction coefficient (e) of DOT-p-DPPs was found to be linearly correlated with the number of terminal DPP units, and a high e of 3.6 × 105 cm−1 L mol−1 was measured for the bigger molecules. These results in combination with theoretical calculation results confirm that the frontier molecular orbitals are mostly localized over the peripheral DPP units. The applications of DOT-p-DPPs in organic solar cells as the electron donor are presented. However, unfavorable nanophase separation and lower DOT-p-DPP content in the blended films led to poor device performance. The two photon absorption cross section of these DPP decorated dendrimers was measured, and high cross section values of over 2000 GM were measured for these dendritic molecules, among which the G1 dendrimer 6T-p-DPP with a high TPA cross section value close to 7000 GM was achieved.


Nature Communications | 2018

Dual stimuli-responsive rotaxane-branched dendrimers with reversible dimension modulation

Xu-Qing Wang; Wei Wang; Wei-Jian Li; Li-Jun Chen; Rui Yao; Guang-Qiang Yin; Yu-Xuan Wang; Ying Zhang; Junlin Huang; Hongwei Tan; Yihua Yu; Xiaopeng Li; Lin Xu; Hai-Bo Yang

With the aim of mimicking biological machines, in which the delicate arrangement of nanomechanical units lead to the output of specific functions upon the external stimulus, the construction of dual stimuli-responsive rotaxane-branched dendrimers was realized in this study. Starting from a switchable organometallic [2]rotaxane precursor, the employment of a controllable divergent approach allowed for the successful synthesis of a family of rotaxane-branched dendrimers up to the third generation with 21 switchable rotaxane moieties located on each branch. More importantly, upon the addition and removal of dimethylsulfoxide (DMSO) molecule or acetate anion as the external stimulus, the amplified responsiveness of the switchable rotaxane units endowed the resultant rotaxane-branched dendrimers the solvent- or anion-controlled molecular motions, thus leading to the dimension modulation. Therefore, we successfully constructed a family of rotaxane-branched dendrimers with dual stimuli-responsiveness that will be a privileged platform for the construction of dynamic supramolecular materials.Mechanically interlocked molecules are extensively applied as artificial molecular machines but rotaxane-branched dendrimers are rarely explored because of synthetic challenges. Here the authors present the construction of dual stimuli-responsive rotaxane-branched dendrimer which can be stimulated by DMSO or acetate ions.


Journal of the American Chemical Society | 2014

Cross-linked supramolecular polymer gels constructed from discrete multi-pillar[5]arene metallacycles and their multiple stimuli-responsive behavior.

Zhong-Yu Li; Yanyan Zhang; Chang-Wei Zhang; Li-Jun Chen; Chao Wang; Hongwei Tan; Yihua Yu; Xiaopeng Li; Hai-Bo Yang


Journal of the American Chemical Society | 2015

Hierarchical Self-Assembly of Discrete Organoplatinum(II) Metallacycles with Polysaccharide via Electrostatic Interactions and Their Application for Heparin Detection

Li-Jun Chen; Yuan-Yuan Ren; Nai-Wei Wu; Bin Sun; Jian-Qiu Ma; Li Zhang; Hongwei Tan; Minghua Liu; Xiaopeng Li; Hai-Bo Yang

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Hai-Bo Yang

East China Normal University

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Li-Jun Chen

East China Normal University

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Xiaopeng Li

University of South Florida

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Quan-Jie Li

Beijing Normal University

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Lin Xu

East China Normal University

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Bo Jiang

East China Normal University

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Cui-Hong Wang

East China Normal University

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Jiuming He

Peking Union Medical College

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Ying Zhang

Beijing Normal University

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Zeper Abliz

Minzu University of China

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