among all the tested compounds, 2,4,6-trinitrophenol (PA) showed the most efficient quenching behaviour attributed to energy transfer from photo-excited
p-electron-rich TPE to ground-state electron deficient PA.
59
N
N
N
N
NH 2
NH 2
H 2 N
H 2 N
M
(M = H 2 , Pd, Ni, MnCl, FeCl, SnCl 2 )
53 M-tapp
CHO
OHC
OHC
CHO
H 2 N
NH 2
50
52
NH 2
NH 2
H 2 N
51
OHC
CHO
OHC
CHO
CHO
OHC
OHC
CHO
OHC
CHO
CHO
54
55
57
56
58
CHO
CHO
OHC
OHC
N
N
O
O
OHC
CHO
Mn
Cl
61
60
NH 2
H 2 N
H 2 N
NH 2
Scheme 4.17 A series of bridging amines (50–53) and aldehydes (54–61)
Fig. 4.15 a SEM and b TEM micrographs of the 50–54 aerogel (bars represent 300 and 50 nm,
respectively). Reproduced with permission from [47]. Copyright © The Royal Society of
Chemistry 2015
144
4 Dynamic Covalent Gels