Photophysical and Electrochemical Studies of 4-Dicyanomethylene 2,6-Dimethyl-4H-Pyran (DDP) Dye with Amides in Water

Gayathri, Somasundaram; Rajaraman, Vasanthi; Vanjinathan, Mahalingam; Rajendran, Kumaran

doi:10.1007/s10895-018-2303-7

Cited by 9 publications

(21 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…DDP dye exhibits two absorption peaks at 248 and 348nm accompanied with a shoulder at 360nm in water (Inset of Figure 1) as reported (Gayathri, Vasanthi, Vanjinathan, & Kumaran, 2018). The absorption peak at 248nm is attributed to the π-π* transition and the absorption peaks above 340nm in water are attributed to the charge transfer (CT) bands.…”

Section: Absorption Spectral Studiessupporting

confidence: 54%

“…The solution of GuHCl was prepared using triple distilled water and the bulk concentration of GuHCl was restricted up to 6.0 M. The concentration of DDP was fixed at 7.1 x 10 -4 M and was diluted with different concentration of GuHCl for photophysical studies. The DDP dye was synthesized based on the literature reported (Gayathri, Vasanthi, Vanjinathan, & Kumaran, 2018).…”

Section: Methodsmentioning

confidence: 99%

“…The Fluorescence decay measurements of DDP dye with GuHCl were recorded using IBH time correlated single-photon counting spectrometer with micro channel plate photomultiplier tube (MCP-PMT) (Hamamatsu, R3809U) as detector. The data analysis was carried out by the software provided by IBH (DAS-6) which is based on reconvolution technique using iterative non-linear least square methods (Gayathri, Vasanthi, Vanjinathan, & Kumaran, 2018). A detailed experimental setup and analysis is provided in the supporting information.…”

Section: Time-resolved Fluorescence Measurements-time Correlated Singmentioning

confidence: 99%

“…Aplot of z' vs z" (Nyquist or cole-cole plots) taken over a wide frequency range (50Hz to 5 MHz) at room temperature was carried out. AC conductivity study is significant in understanding the formation of heterogeneous environment or accumulation of charges in the medium containing more than one micro environment (Gayathri, Vasanthi, Vanjinathan, & Kumaran, 2018).…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

“…(Srividya, Ramamurthy, Shanmugasundaram, & Ramakrishna, 1996;Kumaran & Ramamurthy, 2006;Kumaran & Ramamurthy, 2010;Kumaran, Varalakshmi, & Padma Malar, 2010;Gayathri, Vasanthi, Vanjinathan, & Kumaran, 2018;Sowntharya, Gayathri, Dhenadayalan, Vasanthi, Vanjinathan, & Kumaran, 2017) These studies provides an in-depth understanding on the photophysical properties of host-guest systems. A recent report on DDP dye interaction with amides (Gayathri, Vasanthi, Vanjinathan, & Kumaran, 2018) and urea derivatives (Kumaran & Ramamurthy, 2006) signifies that hydrogen-bonding interactions accompanied with hydrophobicity of the solutes influences the fluorescence emission, lifetime and current-potential voltammograms. The concentration, nature of the solute and the presence of hydrogen-bonding or hydrophobic moieties results in the formation of several microenvironments in aqueous solution such that the dye resides in multi heterogeneous arrangement in aqueous solution with large variation in their fluorescence lifetimes and relative amplitude.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Spectroelectrochemical Investigation of 4-Dicyanomethylene 2,6-Dimethyl-4H-Pyran (DDP) Dye with Guanidine Hydrochloride (GuHCl) in Water

Gayathri¹,

Rajaraman²,

Vanjinathan³

et al. 2019

JMSR

Self Cite

View full text Add to dashboard Cite

Interaction of guanidine hydrochloride (GuHCl) with 4-dicyanomethylene-2,6-dimethyl-4H-pyran (DDP) dye were investigated by photophysical and electrochemical techniques. An enhancement in the fluorescence intensity and formation of an isosbestic point revels that the ground state and excited state properties of DDP dye. The nature of interaction between DDP dye and GuHCl is predominantly through hydrogen-bonding even thoughelectrostatic interaction in aqueous phase operate. The existence of electrostatic interaction by current response function describes that the shift in anodic peak potential towards less positive value indicate electrostatic binding. The existence of more than one microenvironment of DDP dye in aqueous phase is elucidated by Electrochemical Impedence Spectroscopy (EIS) studies through Nyquist plots. These plots signify that there exist at least three different micro environments or dye existing in different fluorescence lifetimes with varying of amplitude. Fluorescence spectral techniques along with electrochemical studies are used as efficient tools to elucidate the nature of interaction of a water soluble probe with hydrogen-bonding solutes is elucidated in our study.

show abstract

Section: Absorption Spectral Studiessupporting

confidence: 54%

Section: Methodsmentioning

confidence: 99%

Section: Time-resolved Fluorescence Measurements-time Correlated Singmentioning

confidence: 99%

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Spectroelectrochemical Investigation of 4-Dicyanomethylene 2,6-Dimethyl-4H-Pyran (DDP) Dye with Guanidine Hydrochloride (GuHCl) in Water

Gayathri¹,

Rajaraman²,

Vanjinathan³

et al. 2019

JMSR

Self Cite

View full text Add to dashboard Cite

show abstract

Transition‐Metal‐Free, Visible‐Light‐Mediated N‐acylation: An Efficient Route to Amides in Water

et al. 2020

Asian J Org Chem

View full text Add to dashboard Cite

A visible‐light‐catalyzed radical N‐acylation of amines with carboxylic acids was achieved by means of eosin Y as the photocatalyst under aqueous medium without any transition‐metal‐based catalytic systems. The new method takes advantages of visible‐light photocatalysis to generate the amides under mild conditions. A variety of amides have been synthesized in good to excellent yields. Moreover, the strategy was successfully applied in the preparation of paracetamol.

show abstract

Deep-Red Emissive Fluorescent Probe for Sensitive Detection of Cysteine in Milk and Living Cells

et al. 2022

View full text Add to dashboard Cite

Photophysical and Electrochemical Studies of 4-Dicyanomethylene 2,6-Dimethyl-4H-Pyran (DDP) Dye with Amides in Water

Cited by 9 publications

References 30 publications

Spectroelectrochemical Investigation of 4-Dicyanomethylene 2,6-Dimethyl-4H-Pyran (DDP) Dye with Guanidine Hydrochloride (GuHCl) in Water

Spectroelectrochemical Investigation of 4-Dicyanomethylene 2,6-Dimethyl-4H-Pyran (DDP) Dye with Guanidine Hydrochloride (GuHCl) in Water

Transition‐Metal‐Free, Visible‐Light‐Mediated N‐acylation: An Efficient Route to Amides in Water

Deep-Red Emissive Fluorescent Probe for Sensitive Detection of Cysteine in Milk and Living Cells

Contact Info

Product

Resources

About