Details

Autor(en) / Beteiligte

• RAJAMOHAN, Rajaram
• LEE, Yong Rok
• NAYAKI, Sundarrajulu Kothai
• SWAMINATHAN, Meenakshisundaram
• PRABU, Samikannu
• MURUGAVEL, Kuppusamy

Titel

Effect of proton ion concentration on the supramolecular interaction between phenoxazine and β-cyclodextrin

Ist Teil von

• Chinese Journal of Analytical Chemistry, 2023-03, Vol.51 (3), p.100229, Article 100229

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •ICs are determined by both neutral and mono-cationic forms of POZ.•POZ:β-CD-ICs were obtained and identified by ground and excited states.•ICs have a stoichiometric ratio of 1:1 as the mole fraction is 0.5 by the jobs plot.•As a result of pH, POZ is affected by the ICs and lies within the cavity of β-CD.•SEM images of the ICs evident the interaction between POZ and β-CD.•Ball and stick representation for the ICs has been proposed. In aqueous and β-cyclodextrin (β-CD) media, the spectral characteristics of phenoxazine (POZ) have been investigated by means of absorption, steady-state, and time-resolved fluorescence techniques. The stoichiometric ratio of the mono-cationic and neutral forms of POZ in the β-CD medium is found to be 1:1. Inclusion complexes of POZ with β-CD has been confirmed in the solid state by the analysis of characterization techniques, such as Fourier transfer infrared spectroscopy (FT-IR), and proton nuclear magnetic resonance spectroscopy, POZ has a significant difference in the ground and excited-state pKa values in aqueous and β-CD media. As a result, the amino group of the molecule, POZ is affected by the complexation process, i.e., it lies within the cavity of β-CD. It is clear from the shape and dimensions of β-CD that the POZ molecule cannot fit completely inside the cavity. As a result, 2POZ’s overall height is 10.6 Å, while β-CD’s is just 7.8 Å. As per the discussion, the structure of the 1:1 complex has also been proposed. Possible schematic representation for the supramolecular interaction between POZ (Guest) and β-CD (Host). [Display omitted]