Hybrid polysilsesquioxanes for fluorescence resonance energy transfer

Nowacka, Maria; Kowalewska, Anna; Plażuk, Damian; Makowski, Tomasz

doi:10.1016/j.dyepig.2019.107622

Cited by 7 publications

(8 citation statements)

References 67 publications

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“…The film made of POSS-triazole-Py had an irregular structure, indicating formation of agglomerates. A similar difference in the structure of thin films was reported by us for LPSQ-Py and POSS-Py [ 30 ]. Silane-triazole-Py formed flat films of constant thickness (2.2 nm) ( Figure S6b ).…”

Section: Resultssupporting

confidence: 83%

“…AFM analysis of the top layer of crystals revealed a certain periodicity ( Figure 8 b). Formation of thin twisted fibers of helical structure was also reported for LPSQ-Py [ 30 ]. LPSQ-amide50-Py and POSS-amide-Py formed large needle-like structures (length 150–200 μm) ( Figure S7 ).…”

Section: Resultssupporting

confidence: 53%

“…The λ max in the FL spectrum of LPSQ-triazole-Py is blue shifted in comparison to POSS-triazole-Py which illustrates the difference in supramolecular organization of Py moieties in the solid state for both materials. Differences in the FL emission λ max were previously observed for LPSQ-Py and POSS-Py [ 30 ]. For the studied silsesquioxane derivatives containing amide groups, LPSQ-amide100-Py and LPSQ-amide75-Py exhibited the highest FL emission intensity ( Figure 13 b).…”

Section: Resultsmentioning

confidence: 72%

“…Due to the unique architecture and properties, even better results can be achieved with linear poly(silsesquioxanes), but not much research has been dedicated to their preparation to date. We have recently shown that optically active linear poly(2-(pyren-1-yl)vinyl)silsesquioxanes (LPSQ-Py) bearing Py moieties in their side chains are highly emissive, even in very dilute solutions [ 30 ]. They exhibited almost exclusively intramolecular excimer emission and scarce fluorescence quenching.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Fluorescent Poly(silsesquioxanes) with Amide- and Triazole-Containing Side Groups for Light Harvesting and Cation Sensing

2020

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Hybrid polymers containing pyrene (Py) units bound to linear poly(silsesquioxane) (LPSQ) chains through flexible linkers containing heteroatoms (S, N, O) (LPSQ-triazole-Py and LPSQ-amide-Py) exhibit intense fluorescence emission, both in very diluted solutions (c = 10-8 mol/L) and in the solid state. The materials are thermally stable and exhibit good thin film forming abilities. Their optical and physicochemical properties were found to be strongly dependent on the structure of the side chains. Comparative studies with octahedral silsesquioxane (POSS) analogues (POSS-triazole-Py and POSS-amide-Py) emphasized the role of the specific double-strand architecture of the LPSQ backbone and distribution of side Py groups for their photo-luminescent properties. The new hybrid materials were tested as fluorescence energy donors to red-emitting dyes (Nile Red and Coumarine 6). All the silsesquioxanes studied were found to be able to transfer FL emission energy to Coumarin 6, irrespectively of their spatial structure. However, due to the differences in the wavelength range of FL emission, only LPSQ-triazole-Py were able to act as energy donors to Nile Red. The Py-grafted LPSQ may be also applied for development of soluble and highly emissive chemosensors. Their fluorescent nature was explored for the detection of Cu(II), Fe(III), Co(II), Ag(I), Hg(II), Mg(II), Ca(II), Pb(II) and Zn(II). The morphology of the side chains and hydrogen-bonding interactions influenced the sensing capacity of all the studied materials.

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Section: Resultssupporting

confidence: 83%

Section: Resultssupporting

confidence: 53%

Section: Resultsmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

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Hybrid Fluorescent Poly(silsesquioxanes) with Amide- and Triazole-Containing Side Groups for Light Harvesting and Cation Sensing

2020

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“…A detailed correlation among energy transfer, overlap area, and separating distance will be placed in a later section 3.2. Light harvesting systems are based on the energy transfer process between the D & A dye molecules and the electron relaxation process in the electronically excited state where the excess excitation energy of a donor migrates to the reaction center of an acceptor via non-radiative pathways [4][5][6][7]. The reaction center accumulates the energy via homo or hetero FRET (fluorescence resonance energy transfer) [7,8].…”

Section: Introductionmentioning

confidence: 99%

A comparative study of conventional FRET and light harvesting properties of Rh-110/Rh-6G and Rh-19/Rh-B organic dye pairs impregnated in sol-gel glasses

Mahato

Kumar

2023

Methods Appl. Fluoresc.

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Two different pairs of laser dyes, Rhodamine-110 (Rh-110)/Rhodamine-6G (Rh-6G) and Rhodamine-19 (Rh-19)/Rhodamine-B (Rh-B) (the first dye in each pair as a donor and the second as an acceptor) were impregnated in silica samples prepared by the sol-gel method and spectroscopically studied using absorption and steady-state fluorescence techniques. The critical transfer distance (R0), actual distance (r) between the donor and acceptor, overlap integral [J(ῡ)], FRET (fluorescence resonance energy transfer) efficiency (E), and antenna effect efficiency (AE) were investigated in detail based on the variation in acceptor concentration. The FRET efficiency, antenna effect efficiency, and actual donor-acceptor distance for Rh-110/Rh-6G and Rh-19/Rh-B dye pairs corresponding to acceptor concentration ranges (3.83 to 7.65)×10-5 M/L and (3.71 to 8.34)×10-5 M/L, respectively, were found to be in the ranges of 57.38% to 74.89%, 36.97% to 24.13%, 5.44 nm to 4.77 nm, and 77.01%. Furthermore, maximum FRET efficiencies of 85.68% and 87.63% and antenna effect efficiencies of 36.97% and 40.95% for Rh-110/Rh-6G and Rh-19/Rh-B, respectively, were also reported. Our results demonstrate the superior FRET efficiency of Rh-19/Rh-B over Rh-110/Rh-6G dye pair in sol-gel glasses, while the antenna effect efficiency of Rh-110/Rh-6G is higher than that of Rh-19/Rh-B for the same donor to acceptor (D/A) ratio. Finally, Rh-110/Rh-6G is a better energy harvester than the Rh-19/Rh-B dye pair at the common D/A ratio. These results are explained in terms of molecular structure similarity, polarity, and rigidity of donor and acceptor.

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More Interaction Sites and Enhanced Fluorescence for Highly Sensitive Fluorescence Detection of Methamphetamine Vapor via Sidechain Terminal Functionalization of Conjugated Polymers

Wang

et al. 2020

ChemistrySelect

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A strategy of sidechain terminal functionalization was proposed to further improve the sensitivity of MA vapor detection. In this work, three fluorescent conjugated polymers (CPs) were synthesized by introducing NHBoc group at the end of the side chains and characterized by GPC, 1H NMR, FT‐IR and 19F NMR. The test results show that the introduction of the NHBoc group reduces the effect of aggregation‐caused quenching (ACQ), thereby improving the fluorescence intensity and fluorescence quantum efficiency of CPs. Secondly, it increases the interaction sites for MA capture and expands the scope of the interaction, thereby increasing the contact probability and interaction between the CPs and MA. Thirdly, the morphology of the CPs has also changed, especially the polymer containing 5‐fluoro‐2,1,3‐benzothiadiazole (1F‐2NHBoc‐CP), whose film has a network‐crosslinked porous structure, which is conducive to the enrichment and penetration of N‐methylphenethylamine (MPEA, a simulant of MA) vapor at low concentration. All these effects contribute to efficient fluorescence quenching, so the 1F‐2NHBoc‐CP can achieve more than 74% fluorescence quenching within 30 s. Taking fluorescence quenching to 1% as the detection limit, MPEA vapor with an actual concentration of 41 ppt can be detected, and its sensitivity is increased by about 25 folds relative to the NHBoc‐free counterpart polymer. Furthermore, it showed a linear correlation with MPEA vapor in the range of 41 ppt to 16 ppm, which spanned five orders of magnitude. This strategy will find a great potential in developing highly sensitive fluorescent probe for dangerous chemical vapor detection.

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Hybrid polysilsesquioxanes for fluorescence resonance energy transfer

Cited by 7 publications

References 67 publications

Hybrid Fluorescent Poly(silsesquioxanes) with Amide- and Triazole-Containing Side Groups for Light Harvesting and Cation Sensing

Hybrid Fluorescent Poly(silsesquioxanes) with Amide- and Triazole-Containing Side Groups for Light Harvesting and Cation Sensing

A comparative study of conventional FRET and light harvesting properties of Rh-110/Rh-6G and Rh-19/Rh-B organic dye pairs impregnated in sol-gel glasses

More Interaction Sites and Enhanced Fluorescence for Highly Sensitive Fluorescence Detection of Methamphetamine Vapor via Sidechain Terminal Functionalization of Conjugated Polymers

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