Complex sentence: An alternative approach is to use solvatochromic dyes, which change their proprieties (intensity, half-life, and excitation and emission spectra) depending on the polarity and charge of their environments, hence they are sometimes loosely referred to as environmentally sensitive dyes.
Split into simpler sentences: An alternative approach is to use solvatochromic dyes, which change their proprieties (intensity, half-life, and excitation and emission spectra) depending on the polarity and charge of their environments. Hence they are sometimes loosely referred to as environmentally sensitive dyes.