Synthesis and fluorescence of polyurethane cationomers N-modified with a stilbene chromophore

Buruiana, Emil C.; Buruiană, Tinca; Strat, Georgeta; Strat, M.

doi:10.1016/s1010-6030(03)00319-8

Cited by 24 publications

(15 citation statements)

References 20 publications

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“…This is an indication of the energy losses during the transition into excited state. The Stokes shift values for FWPU indicate that the less non‐radiative process of FWPU is relatively important …”

Section: Resultsmentioning

confidence: 99%

Preparation of waterborne polyurethane with outstanding fluorescence properties and programmable emission intensity

Tao

Han

Bao

et al. 2017

Polymer International

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The hard segment content and hydrophilic group content of a fluorescent waterborne polyurethane (FWPU) were used to optimize the polymer structure which can influence the fluorescence properties. The synthesis of FWPU was based on 2,2′‐((4‐([3,3′:6′,2″‐terpyridine]‐4′‐yl)phenyl)azanediyl)diethanol (TPPDA) as fluorophore. The structure of FWPU was characterized using Fourier transform infrared and 1H NMR spectroscopies, and the polymer molecular weight and polydispersity were measured using gel permeation chromatography. The relationship between fluorescence properties and FWPU structure was studied using luminescence spectrometry. Compared to TPPDA, the maximum emission wavelength of FWPU showed a hypsochromic shift, and the fluorescence emission intensity and quantum yield of FWPU were increased obviously. Moreover, increasing the hard segment content led to an enhancement of the fluorescence lifetime of FWPU, and to the fluorescence intensity increasing at first and then decreasing. The fluorescence emission intensity and quantum yield of FWPU were increased nearly 11 and 7 times, respectively, compared to TPPDA when the hard segment content was 65%. With an increase of hydrophilic group content, the fluorescence emission intensity of FWPU increased. The fluorescence emission intensity of FWPU exhibited a response to pH, which facilitated its employment as a fluorescence probe. FWPU with excellent solid fluorescence is very suitable for processing into optical devices, with increasing hard segment content and hydrophilic group content both enhancing the solid fluorescence emission intensity of FWPU. © 2016 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Preparation of waterborne polyurethane with outstanding fluorescence properties and programmable emission intensity

Tao

Han

Bao

et al. 2017

Polymer International

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“…Following the behaviour of Az-PA6 copolymer, the trans isomer is converted into the contracted cis form after longer times of UV irradiation (over 200 min) in order to reach the steady state. For the same irradiation times (28 min), the content of cis isomer in solution of PA6 was 25%, but in each case the kinetics of the photoprocess [24] is of first order (Fig. 7, plot b).…”

Section: Photochemical Modification Induced By Uv Lightmentioning

confidence: 91%

Azo alkylammonium polyacrylates with one and two alkyl chains: Synthesis and properties

Buruiana

Buruiană

Melinte

2006

Reactive and Functional Polymers

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“…S-Cl was synthesized by the reaction of 4-hydroxymethylstilbene with 4-chloromethylphenylisocyanate as previously reported [21]. 1 …”

Section: Synthesis Of 4-chloromethylphenylcarbamoyloxymethyl-para-stimentioning

confidence: 99%

“…[15] and data not shown), dipeptide [16], hydroxamic acids [17] and ammonium/pyridinium groups [18], together with the investigation of polymeric (chromo)fluorophores with triazene, stilbene, anthracene or pyrene units in their backbone [19][20][21][22][23][24][25]. Although phenylalanine has been employed in obtaining some stilbene co-polymers, to our knowledge explorations in the area of those which contain ammonium quaternary groups are limited.…”

Section: Introductionmentioning

confidence: 99%

Photo-polymers Containing (S)-Phenylalanine and Stilbene Pendants: Synthesis and Properties of Ionic Polyacrylates

Buruiana¹,

Zamfir²,

Melinte³

et al. 2010

Designed Monomers and Polymers

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Radical co-polymerization of N-acryloyl-(S)-phenylalanine benzyl ester with N,N-dimethylaminoethyl acrylate using microwave-assisted rapid synthesis led to a co-polymer to be subsequently quaternized with 4-chloromethylphenylcarbamoyloxy-methylstilbene. 1 H-NMR spectroscopy was employed to determine the molar ratio of monomeric units (1:5.6) and the content of fluorophore (0.15 molar fraction) from the co-polymer. Also, the photophysical properties of the photo-polymer including the fluorescence response toward some amines in DMF solution have been investigated. The effect of monomethyl viologene, 4,4 -bipyridyl, 2,2 -bipyridyl, piperazine and triethylamine, used as quenchers of stilbene fluorescence from co-polymer, was compared with that of ferrocene.

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Synthesis and fluorescence of polyurethane cationomers N-modified with a stilbene chromophore

Cited by 24 publications

References 20 publications

Preparation of waterborne polyurethane with outstanding fluorescence properties and programmable emission intensity

Preparation of waterborne polyurethane with outstanding fluorescence properties and programmable emission intensity

Azo alkylammonium polyacrylates with one and two alkyl chains: Synthesis and properties

Photo-polymers Containing (S)-Phenylalanine and Stilbene Pendants: Synthesis and Properties of Ionic Polyacrylates

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