Conformational Dynamics of Semiflexibly Bridged Donor−Acceptor Systems Studied with a Streak Camera and Spectrotemporal Parametrization of Fluorescence

Lauteslager, Xavier Y.; Stokkum, Ivo H. M. van; Ramesdonk, Hendrik J. van; Brouwer, Albert M.; Verhoeven, J. W.

doi:10.1021/jp983595h

Cited by 39 publications

(36 citation statements)

References 19 publications

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“…Since the driving force for folding decreases with solvent polarity, it can be expected (and has been observed60) that the CCT emission intensity decreases correspondingly. Based upon results for similar compounds,50,60 we believe that the maxima in diisopropyl ether and the more polar solvents are representative for ECT fluorescence and can be used as such in the fitting procedure.…”

Section: Resultsmentioning

confidence: 99%

Photoinduced Charge Separation in Cyclohexylidene‐Based Donor−(σ‐Bridge)−Acceptor Compounds − Building Blocks for Materials

et al. 2003

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We describe the syntheses and properties of five semi-rigid donor−(σ-bridge)−acceptor (D−σ−A) compounds. These compounds, which are candidates for incorporation in materials, have aniline-type donors and (mixed) cyano-and alkoxycarbonyl-1,1-difunctionalized vinyl acceptors that are separated by a four-σ-bond bridge. Their electronic properties were studied by means of photoelectron spectroscopy in combination with ab initio MO calculations, cyclic voltammetry, UVVis absorption spectroscopy, (time-resolved) fluorescence spectroscopy, and time-resolved microwave conductivity (TRMC). We found that these D−σ−A compounds exhibit a

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Section: Resultsmentioning

confidence: 99%

Photoinduced Charge Separation in Cyclohexylidene‐Based Donor−(σ‐Bridge)−Acceptor Compounds − Building Blocks for Materials

et al. 2003

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“…The last peak at 289.6 eV corresponds to the carboxylic carbon. [28][29][30][31][32][33][34][35] The analysis of the carbon 1s core level region for a SAM of 11-MUA represents the starting point to characterize the functionalization process with macrocycle 2 28 or with naphthalimide rotaxane. Figure 2, top panel, shows the C 1s core level region for a monolayer functionalized with naphthalimide rotaxane molecules: as can be clearly seen, there are several differences between the spectrum recorded for the SAM alone and for the SAM modified with the rotaxane, confirming that they refer to different situations.…”

Section: Methodsmentioning

confidence: 99%

Structural, Electrochemical, and Photophysical Properties of a Molecular Shuttle Attached to an Acid-Terminated Self-Assembled Monolayer

Cecchet¹,

Rudolf²,

Rapino³

et al. 2004

J. Phys. Chem. B

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Structural, electrochemical, and photophysical properties of a molecular shuttle attached to an acid-terminated self-assembled monolayer Cecchet, F; Rudolf, Petra; Rapino, S; Margotti, M; Paolucci, F; Baggerman, J; Kay, ER; Wong, JKY; Leigh, DA; Kay, Euan R. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. March 30, 2004; In Final Form: July 6, 2004 A benzylic amide macrocycle containing a pyridine moiety (macrocycle 2) and a related benzylic amide macrocycle-based molecular shuttle (naphthalimide rotaxane) with two pyridine moieties on the macrocyclic unit were grafted onto a self-assembled monolayer (SAM) of 11-mercaptoundecanoic acid (11-MUA) on gold. X-ray photoelectron spectroscopy (XPS) indicates that the molecules are linked to the SAM by hydrogenbonding. Electrochemical investigations show that the self-assembled monolayer is densely packed and well ordered and allows the estimation of the average thickness of the SAM alone and of the SAM functionalized with either macrocycle 2 or with naphthalimide rotaxane. The estimated thickness values suggest that the 11-MUA chains in the SAM are tilted with respect to the surface normal, as expected for ordered and stable SAMs, whereas the rotaxane molecules are oriented with the thread parallel to the SAM surface and macrocycle plan preferentially perpendicular to the surface. The photophysical studies of the naphthalimide rotaxane grafted onto the SAM on gold demonstrated that fluorescence is partially quenched but still remains easily measurable because the presence of the SAM reduces the quenching effect of the metal substrate. Moreover, the photophysical analysis clearly indicates that the naphthalimide part of the rotaxane strongly interacts with the carboxylic groups of the SAM, in agreement with the orientation of the molecule obtained from the electrochemistry.

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“…The time needed for each measurement was 100 s. Fluorescence emission spectra were fitted with a skewed Gaussian function (Eq. 2 ) [ 31 ]. …”

Section: Resultsmentioning

confidence: 99%

A fluorescence approach to investigate repartitioning of coalescing agents in acrylic polymer emulsions

et al. 2011

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Repartitioning of co-solvents between particles of latex emulsions was investigated by means of a fluorescence method based on the detection of the amount of co-solvent via the solvatochromic shift of the emission maximum of a fluorescent probe, copolymerized at a low concentration. Complete repartitioning of co-solvents between particles of latex materials with a low Tg (ca. 25 °C) occurred within minutes. For a hydrophilic latex with a Tg of 68 °C, equilibration was achieved within an hour. Repartitioning was faster for more hydrophobic co-solvents. For a hydrophobic latex of similar Tg, co-solvent repartitioning took place on the same time scale, but complete equilibration was not reached. Possibly, there is an additional slow component in the repartitioning, or the prolonged presence of co-solvent causes a structural change in the latex particles that affects the outcome of the experiment.

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Conformational Dynamics of Semiflexibly Bridged Donor−Acceptor Systems Studied with a Streak Camera and Spectrotemporal Parametrization of Fluorescence

Cited by 39 publications

References 19 publications

Photoinduced Charge Separation in Cyclohexylidene‐Based Donor−(σ‐Bridge)−Acceptor Compounds − Building Blocks for Materials

Photoinduced Charge Separation in Cyclohexylidene‐Based Donor−(σ‐Bridge)−Acceptor Compounds − Building Blocks for Materials

Structural, Electrochemical, and Photophysical Properties of a Molecular Shuttle Attached to an Acid-Terminated Self-Assembled Monolayer

A fluorescence approach to investigate repartitioning of coalescing agents in acrylic polymer emulsions

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