Investigation of Cinnamaldehyde Derivatives as Potential Organic UV Filters

Table 2

Effective absorbance ranges of five cinnamaldehyde derivatives. FWHM is full-width at half maximum absorbance. HWHM is half-width at half maximum absorbance.

Compound	λmax (nm)	Absorption range (FWHM)	Δ FWHM (−)	Δ (nm) FWHM (+)	Absorption range (HWHM)	Δ HWHM (−)	Δ (nm) HWHM (+)
1	377.3	327.1 to 414.5 nm	50.2	37.2 nm	352.2 to 395.9 nm	25.1	18.6 nm
2	361.5	321.5 to 398.7 nm	40.0	37.2 nm	341.5 to 398.7 nm	20.0	18.6 nm
3	392.0	350.6 to 422.6 nm	41.4	30.6 nm	371.3 to 407.3 nm	20.7	15.3 nm
4	391.2	349.2 to 426.0 nm	42.0	34.8 nm	370.2 to 408.6 nm	21.0	17.4 nm
5	410.8	368.2 to 446.6 nm	42.6	35.8 nm	389.5 to 428.7 nm	21.3	17.9 nm