The effect of hydrogen-bond in alcoholic solvent on the solvation ultrafast dynamics of oxazine 750 dye

Zhou, Lichuan; Shi, Ying; Liu, Jianyong; Han, Keli

doi:10.1007/s11434-008-0218-4

Cited by 8 publications

(5 citation statements)

References 17 publications

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“…In the case of ACN, DMF, and DMSO, the faster component corresponds to N (in DMF and DMSO) and C 2+ forms (in ACN) of OXO and the slower component corresponds to the C + form of OXO. In methanol, the slower component corresponds to the C + form whereas the faster component is due to the intramolecular vibrational redistribution and solute–solvent intermolecular photoinduced electron transfer . The Raman spectrum analysis in the presence as well as in the absence of OXO shows that the G band and D band moving to the longer and shorter wavelengths is due to the hydrogen bond formation between GO and OXO.…”

Section: Standardization Of the Diverse Roles Of Graphene Oxide (Go)mentioning

confidence: 94%

“…In methanol, the slower component corresponds to the C + form whereas the faster component is due to the intramolecular vibrational redistribution and solute−solvent intermolecular photoinduced electron transfer. 21 The Raman spectrum analysis in the presence as well as in the absence of OXO shows that the G band and D band moving to the longer and shorter wavelengths is due to the hydrogen bond formation between GO and OXO. FLIM images indicate that adsorption of OXO molecules on the surface of GO occurs, and there is a heterogeneous distribution of OXO on the GO surface.…”

Section: ■ Standardization Of the Diverse Roles Of Graphene Oxide (Go)mentioning

confidence: 97%

See 1 more Smart Citation

Graphene Oxide-Induced Prototropism and Enhancement of Fluorescence Yield of Organic Molecules in Solutions: Recent Advances

Pandit,

Seth

2024

Langmuir

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Till date, humankind has mainly acknowledged the quenching phenomenon of graphene oxide (GO). From a fundamental science standpoint, the unique and dynamic prospects of graphene oxide have been showcased in a brief but concise manner. Worldwide research studies have proven that graphene oxide has tremendous potentiality in showcasing breakthroughs in the fields of both basic science and innovative applications. In this Perspective, the fact that, apart from the very common fluorescence quenching phenomenon, graphene oxide can also enhance fluorescence intensity, promote prototropism, demonstrate aggregation-induced emission, and itself exhibit photoluminescence properties in nonaqueous media has been highlighted. It draws attention to the fact regarding unveiling the unknown properties of graphene oxide that might be useful to scientific communities in upcoming years.

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Section: Standardization Of the Diverse Roles Of Graphene Oxide (Go)mentioning

confidence: 94%

Section: ■ Standardization Of the Diverse Roles Of Graphene Oxide (Go)mentioning

confidence: 97%

Graphene Oxide-Induced Prototropism and Enhancement of Fluorescence Yield of Organic Molecules in Solutions: Recent Advances

Pandit,

Seth

2024

Langmuir

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“…In the present work, we used the femtosecond time-resolved stimulated emission pumping fluorescence depletion (FS TR SEP FD) technique 10,[44][45][46][47][48][49][50][51][52] to investigate the rotational dynamics of four 7-animocoumarins (C440, C460, C500 and C503, Scheme 1) in methanol, dimethylformamide (DMF), and DMSO. The aim of the present work is to distinguish the effects of the three types of hydrogen bond on rotational dynamics of 7-aminocoumarins in excited states.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical study of the rotational reorientation dynamics of 7-animocoumarin derivatives in polar solvents: hydrogen-bonding effects

Zhou

Song

Han

et al. 2009

Phys. Chem. Chem. Phys.

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The rotational reorientation dynamics of 7-aminocoumarin derivatives with different alkylation degrees in methanol, dimethylformamide, and dimethyl sulfoxide have been investigated using femtosecond time-resolved stimulated emission pumping fluorescence depletion (FS TR SEP FD) spectroscopy. In addition to a long anisotropy decay time that accounts for the overall rotational relaxation of solutes, a short anisotropy decay time on the order of picoseconds or sub-picoseconds was also observed in hydrogen-bonding systems. Three types of hydrogen bonds involving the nitrogen lone pair, carbonyl group, and amino group of 7-aminocoumarin derivatives were denoted as types A, B, and C, respectively. Density functional theory (DFT) and time-dependent DFT (TDDFT) calculations were carried out to investigate the geometric structures of isolated coumarins and hydrogen-bonded complexes in the ground and excited states, respectively. According to our results and analysis, the rapid anisotropy decays observed here in hydrogen-bonding systems may be associated with the strengthening of hydrogen bonds B or C, or both in the excited state of hydrogen-bonded coumarin-solvent complexes, and are independent of the breaking of hydrogen bond A. The strengthening of hydrogen bond C in the excited state of 7-aminocoumarin-DMF and 7-aminocoumarin-DMSO complexes has been demonstrated theoretically for the first time. Further experimental studies would be crucial to confirm this observation.

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“…With the advent of the ultrafast laser technology and the pump-probe method, one can "see" the making and breaking of the molecular bonds, and can follow the flow of energy and charge within molecular systems in real time. Since the pioneering ultrafast study of photodissociation of ICN was carried out by Zewail et al in the late 1980s [1], there has been a lot of work using the femtosecond time-resolved pump-probe method to provide a wealth of knowledge of the photophysics and photochemistry of isolated molecules and molecular clusters [2][3][4][5][6], as well as those in solution [7], solid phase [8] and light-harvesting complexes [9]. Carbon disulfide (CS 2 ) is a prototypical triatomic molecule, which plays an important role in stratospheric chemistry.…”

mentioning

confidence: 99%

Ultrafast dynamics and dissociative ionization of CS2 molecules studied via the femtosecond pump-probe method

et al. 2011

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The ultrafast dynamics and dissociative ionization of CS 2 were studied using the pump-probe method with time-of-flight mass spectroscopy. The transient behavior of both parent ion (CS 2 + ) and fragment ions (S + and CS + ) was observed. It was found that all the ionic signals decay exponentially with lifetimes that were different for delay times, t>0 and t<0, which can be attributed to the evolution of different Rydberg states pumped by 267-nm and 400-nm laser pulses. The lifetimes of two Rydberg states were obtained simultaneously from one fitting of the transients. The fragment ions were produced by the dissociation of CS 2 + , and it is suggested that the final ionic state is the C Photo-induced dynamics of polyatomic molecules has been of area of research of great interest for many years. With the advent of the ultrafast laser technology and the pump-probe method, one can "see" the making and breaking of the molecular bonds, and can follow the flow of energy and charge within molecular systems in real time. Carbon disulfide (CS 2 ) is a prototypical triatomic molecule, which plays an important role in stratospheric chemistry. CS 2 has been the subject of high-resolution spectroscopic measurements and photodissociation dynamics studies for *Corresponding author (email: xuhf@jlu.edu.cn) many years. Rich information on the first five electronic excited states of neutral CS 2 in the wavelength range of 290-410 nm has been obtained [10]. Efforts have also been made to understand the structure and non-adiabatic dynamics of the predissociation 1 B 2 ( 1 Σ u + ) state over the wavelength range 180-230 nm. These include high-resolution absorption [11], resonance enhanced multiphoton ionization (REMPI) [12] and laser induced fluorescence [13] spectroscopic studies, and dynamic studies [14], to determine the channel branch ratio, the fragment energy partition, and the lifetime. Rydberg series were investigated in a wide range of excitation energies using the (2+1) and (3+1) REMPI methods [15]. In addition to the neutral CS 2 molecule, the structure and dynamics of the ground and excited ionic state, CS 2 + , have been investigated by several groups, using synchrotron-based pulse-field-ionization photoelectron spectroscopy [16], the photoelectron photoion coincidence technique [17], photofragment excitation spectroscopy [18][19][20], and the optical-optical double resonance technique

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The effect of hydrogen-bond in alcoholic solvent on the solvation ultrafast dynamics of oxazine 750 dye

Cited by 8 publications

References 17 publications

Graphene Oxide-Induced Prototropism and Enhancement of Fluorescence Yield of Organic Molecules in Solutions: Recent Advances

Graphene Oxide-Induced Prototropism and Enhancement of Fluorescence Yield of Organic Molecules in Solutions: Recent Advances

Experimental and theoretical study of the rotational reorientation dynamics of 7-animocoumarin derivatives in polar solvents: hydrogen-bonding effects

Ultrafast dynamics and dissociative ionization of CS2 molecules studied via the femtosecond pump-probe method

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