Electronic transitions

Especially relevant of piezochemical mechanosynthesis is inter system crossing.
Flipping spins fast such that parallel spins don't block covalent bond formation, or make it unreliable, or make it inefficient.

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Phosphorescense may be relevant for mechanooptical energy conversion where a long de-excitation/decay time allows for
a mechanical transport to a different location between mechanical excutation and optical deexcitation.
See: Optical effects "photonic steampunk" section

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Overview:

		multiplicity constant	multiplicity gets changed (slow, since "forbidden")
energy is released	with emission of radiation	fluorescence z. B. $$S_1 \rightarrow S_0$$	phosphorescence z. B. $$T_1 \rightarrow S_0$$
	radiationless	Schwingungs- bzw. vibronic relaxation* z. B. $$S_0^* \rightarrow S_0$$ und $$T_1^* \rightarrow T_1$$
energy stays constant		inner conversion z. B. $$S_1 \rightarrow S_0^*$$	Intersystem Crossing z. B. $$S_1 \rightarrow T_1^*$$ und $$T_1 \rightarrow S_0^*$$

Related

• Inter system crossing
• Fun with spins
• Non mechanical technology path
• Photonics

External links

Wikipedia:

• (en): Intersystem crossing
• (de): Intersystem Crossing – (German version has a nice table)
• (en): Internal conversion (chemistry)
• (de): Innere Umwandlung – (German version has a nice table)

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• (en): Vibronic coupling
• (en): Vibronic_spectroscopy
• (de): Photophysikalischer Prozess – no english version of this page as of yet (2021-06)