Table 3 Functionalities responsive to temperature, redox, light, and hypoxia

Ethoxyethyl glycidal ether

Heat: Δ @ 29.6–40.4 °C

[50]

NIPAM–acrylamide

Heat: Δ @ 30–32 °C

[47, 48, 50]

Methylvinylether

Heat: Δ @ 35–37 °C

[47, 50]

2-(2-ethoxy) ethoxyethyl vinyl ether

Heat: Δ @ 41 °C

[50]

Disulfide

Glutathione reduction

[49, 52, 56]

2-Nitrophenyl ester

Ultraviolet light >310 nm

[45, 51, 52]

Spiropyran

Light

[51, 52]

Azobenzene

Hypoxia and light

[45, 48, 51, 52]

Nitroaromatic

Hypoxia

[95]

Quinone

[45]