Time-resolved delayed luminescence of chlorophyll a in anhydrous polymer systems

Localized Nano-Environment for Integration and Optimum Functionalization of Chlorophyll-a Molecules

“…Such an environment allows uniform distribution and dispersion of the molecules within the synthetic medium for enhanced photosensitivity. Higher solvent volume reflects higher concentration of CMC aqueous media, in agreement with literature [23] stating influence in the absorption spectra of Chl-a films. Therefore, the native state of Chl-a molecules were still retained in cellulose derivatives even in high concentrations of CMC.…”

“…Advantages are attributed to more rigid stability and ability to control dispersion of incorporated photosynthetic molecules. CMC also acts as an effective dispersion agent for the active material and had been extensively studied and reviewed [18][19][20][21][22][23]. Formed as a film on top of the photosynthetic pigments, CMC are also observed to preserve photosensitivity for extended periods of time [3] while allowing crucial transfer of oxygen and moisture.…”

“…Chl-a molecules embedded within the CMC and other cellulose derived polymer matrix films were able to exhibit potential in mimicking the property as photosynthetic pigment "in-vivo" systems. In one such work, Wrobel et al [23] reported Chl-a molecules in polymer matrix of polyvinyl alcohol (PVA) and cellulose derivatives. In their work, Chl-a in monomeric form, dimer and nitrocellulose complex (NC) forms were investigated.…”

“…For the current work, a target Chl-a suspension in chloroform (CHCl3) was prepared as suggested in literature [22,23]. A concentration of 0.45 mg/ml was prepared and stored in a fridge for three days prior to usage.…”

“…In certain CMC concentrations (Figure 4(d) and (g)), higher absorptions were registered at both bands compared to free Chl-a molecules suggesting applications in "in-vitro" biomimetic immobilizing media in synthetic mixture [34]. Elsewhere [22,23], higher values of absorbance peaks have been reported.…”