Unanticipated bright blue fluorescence produced from novel hyperbranched polysiloxanes carrying unconjugated carbon–carbon double bonds and hydroxyl groups

Niu, Song; Yan, Hongxia; Chen, Zhengyan; Song, Li; Xu, Peiyu; Zhi, Xiaoli

doi:10.1039/c6py00654j

Cited by 78 publications

(79 citation statements)

References 45 publications

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“…[23][24][25] Inspired by this policy, an endeavor in this investigation has been made to successfully explore a novel silicon-containing hyperbranched epoxy (SHBEp) through a straightforward, easily controllable and economic A 2 + B 3 transesterification reaction using the methoxyl group of (3-glycidyloxypropyl)trimethoxysilane (A-187) and excess hydroxyl groups of neopentyl glycol (NPG) under solvent-free and catalyst-free conditions. [23][24][25] Inspired by this policy, an endeavor in this investigation has been made to successfully explore a novel silicon-containing hyperbranched epoxy (SHBEp) through a straightforward, easily controllable and economic A 2 + B 3 transesterification reaction using the methoxyl group of (3-glycidyloxypropyl)trimethoxysilane (A-187) and excess hydroxyl groups of neopentyl glycol (NPG) under solvent-free and catalyst-free conditions.…”

Section: Introductionmentioning

confidence: 99%

A multifunctional silicon-containing hyperbranched epoxy: controlled synthesis, toughening bismaleimide and fluorescent properties

Niu

Yan

et al. 2016

J. Mater. Chem. C

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A novel silicon-containing hyperbranched epoxy (SHBEp) has been explored via a one-pot A 2 + B 3 polycondensation reaction using (3-glycidyloxypropyl)trimethoxysilane (A-187) and excess neopentyl glycol (NPG) under solvent-free and catalyst-free conditions. We investigate for the first time bismaleimide (BMI) toughening effect using the fabricated polymer, and a series of SHBEp/BMI thermosets are then constructed, and then their mechanical properties like impact strength, flexural strength, and thermal stability are studied; meanwhile the toughening effect of SHBEp and conventional epoxy resin E51 is also compared. The results indicate that a proper addition of SHBEp (8 wt%) can significantly improve the toughness and thermal performance of thermosets compared to E51 with the same content. It is, therefore, revealed that the polymer is promising to act as an effective BMI toughener. Unexpectedly, a bright blue photoluminescence is observed when the SHBEp is excited under 365 nm UV light, and its average fluorescence lifetime and absolute fluorescence quantum yield are 4.30 ns and 4.61% respectively. It is demonstrated by our primary investigation that the epoxide and hydroxyl groups simultaneously help the light emission. Thus, the SHBEp bearing unconventional chromophores is also particularly expected to be a new light-emitting material. † Electronic supplementary information (ESI) available: GPC curve, the predicted 29 Si NMR of the obtained polymer, TGA and DSC curves, and additional hyperbranched polysiloxanes. See

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Section: Introductionmentioning

confidence: 99%

A multifunctional silicon-containing hyperbranched epoxy: controlled synthesis, toughening bismaleimide and fluorescent properties

Niu

Yan

et al. 2016

J. Mater. Chem. C

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“…When the oxygen atoms clustered, the atoms afforded through space interactions (TSI) via the electron overlap between the lone pair electrons. [ 17 ] The existence of SiO made SiORed‐7 more flexible and thus shorten the distances between the oxygen atoms, [ 18 ] and therefore the TSI were more easily to occur. The calculation results verified that the shortest distance between adjacent O atoms was about 2.631 Å, which allowed the strong TSI (Figure S21, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Robust Organoalkoxysilanes as Red Unconventional Fluorescent Platform

Zuo

Yang

Gou

et al. 2020

Adv Funct Materials

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Unconventional fluorescent materials have attracted intense and continuous attention due to the facile processability, excellent biocompatibility, and high availability. However, for the lack of suitable unconventional fluorescent platform, unconventional luminophore‐based fluorescent probes have not been applied in the biological field, especially in the detection of bioactive molecules. In this work, unconventional red fluorescence is observed from a series of organoalkoxysilanes for the first time. Particularly, the unique fluorescence derived from smart Si–O bridged structures prompt the fluorescent probe design strategy. The strategy involves applying the Si–O bridge to provide desirable red unconventional fluorescence, and ratiometric detection of endogenous nitric oxide in lysosomes and in vivo. It is expected that this novel strategy will expand the applications of unconventional fluorescence to the bioimaging field, and further provide valid approach for the future evolution of unconventional fluorescent probes.

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“…Most of them contain carbonyl (CO) groups in the form of anhydride, ester, amide, and imide, such as poly[(maleic anhydride)‐ alt ‐(vinyl acetate)] (PMV), poly(maleic anhydride‐ alt ‐vinyl pyrrolidone) (PMVP), polyisobutene succinic anhydrides (PIBSA), oligo(maleic anhydride) (OMAh), poly( N ‐hydroxysuccinimide methacrylate) (PNHSMA), polyurethanes (PU), poly(ethylene terephthalate) (PET), and sulfonated acetone–formaldehyde (SAF) condensates . Some other polymers like polysiloxanes containing unconjugated CC double bonds and hydroxyl (OH) groups, polyacrylonitrile (PAN), and hyperbranched polyether epoxy (HBPEE) are also found to be luminescent. Moreover, many natural occurring polymers that do not contain aromatic groups are also reported to emit fluorescence or phosphorescence …”

Section: Introductionmentioning

confidence: 99%

Enhancing Photoluminescence of Nonconventional Luminescent Polymers by Increasing Chain Flexibility

Shang

Zhao

Wei

et al. 2019

Macro Chemistry & Physics

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Many nonconventional luminescent polymers are found to exhibit intrinsic photoluminescence and “aggregation‐induced emission” (AIE) behavior. Strong physical interactions among polymer chains and/or a rigid molecular conformation of polymer chains are thought to be beneficial to boost stronger emissions. The purpose of this work is to prove that increasing chain flexibility is, at least in some cases, beneficial to enhance the photoluminescence of nonconventional luminescent polymers. Poly(itaconic anhydride) (PITA) and poly[(1‐octene)‐co‐(itaconic anhydride)] (POITA) synthesized in this work are highly emissive in concentrated solutions and in solid state, exhibiting typical AIE characteristics, and very interestingly, the copolymer POITA exhibits stronger and red‐shifted emissions than the homopolymer PITA in both solutions and in the solid state. These results are explained by the increase of chain flexibility, which makes the nonconventional chromophores adopt proper conformations for strong intra‐ and/or interchain n‐π* and/or π–π* interactions. This study sheds some light on designing nonconventional luminescent materials with high emission efficiency and long wavelength emission.

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Unanticipated bright blue fluorescence produced from novel hyperbranched polysiloxanes carrying unconjugated carbon–carbon double bonds and hydroxyl groups

Abstract: Bright blue fluorescence-emitting hyperbranched polysiloxane simultaneously carrying unconjugated carbon–carbon double bonds and hydroxyl groups is reported for the first time.

Cited by 78 publications

References 45 publications

A multifunctional silicon-containing hyperbranched epoxy: controlled synthesis, toughening bismaleimide and fluorescent properties

A multifunctional silicon-containing hyperbranched epoxy: controlled synthesis, toughening bismaleimide and fluorescent properties

Robust Organoalkoxysilanes as Red Unconventional Fluorescent Platform

Enhancing Photoluminescence of Nonconventional Luminescent Polymers by Increasing Chain Flexibility

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