| abstract |
The present proposals relate to enhancement of photosynthesis in plants and to algaecidal compositions. In these proposals, the CND compound has the formula: CND-[(L)<sub>y</sub>-X] in which: CND is a carbon nanodot having a diameter in the range 0.5-20 nm; L is a linker selected from C<sub>1-20</sub> alkylene, or C<sub>1-20</sub> alkenylene groups optionally including 1-5 heteroatoms selected from -0-, - N(H)-, and -S-; X is selected from: a) PEG-(NR<sub>2</sub>)<sub>q</sub>, in which each R is independently H or C<sub>1-6</sub> alkyl and the integer q is 0 or 1 and in which the PEG-(NR2)q is not associated with a nucleic acid; b) a sugar moiety; and c) an NR2 group, in which each R is independently H or C<sub>1-6</sub> alkyl wherein PEG is a polyethylene glycol having a weight average molecular weight (Mw) greater than 200 the integer y is 0 or 1; wherein when y is 1, each of the CND and X moieties is attached to the L group either directly or via an amide bond; and z is an integer greater than or equal to 1. |