Editing Phosphor (section)

===Oxygen sensing===
Quenching of the triplet state by O<sub>2</sub> (which has a triplet ground state) as a result of [[Dexter electron transfer|Dexter energy transfer]] is well known in solutions of phosphorescent heavy-metal complexes and doped polymers.<ref>{{Cite journal|last1=Lehner|first1=P.|last2=Staudinger|first2=C.|last3=Borisov|first3=S. M.|last4=Klimant|first4=l.|title=Ultra-sensitive optical oxygen sensors for characterization of nearly anoxic systems|journal= Nature Communications|date=2014|volume=5|page=4460|doi=10.1038/ncomms5460 |pmid=25042041 |pmc=4109599 |bibcode=2014NatCo...5.4460L }}</ref> In recent years, phosphorescence porous materials(such as [[Metal–organic framework]]s and [[Covalent organic framework]]s) have shown promising oxygen sensing capabilities, for their non-linear gas-adsorption in ultra-low partial pressures of oxygen.<ref>{{Cite journal|last1=Hamzehpoor|first1=E|last2=Ruchlin|first2=C.|last3=Tao|first3=Y.|last4=Liu|first4=C. H.|last5=Titi|first5=H. M.|last6=Perepichka|first6=D. F.|title=Efficient room-temperature phosphorescence of covalent organic frameworks through covalent halogen doping|journal=Nature Chemistry|date=2022|volume=15|issue=1|pages=83–90|doi=10.1038/s41557-022-01070-4|pmid=36302870|s2cid=253183290}}</ref><ref>{{Cite journal|last1=Xie|first1=Z.|last2=Ma|first2=L.|last3=deKrafft|first3=K. E.|last4=Jin|first4=A.|last5=Lin|first5=W.|title=Porous phosphorescent coordination polymers for oxygen sensing|journal=J. Am. Chem. Soc.|date=2010|volume=132|issue=3 |pages=922–923|doi=10.1021/ja909629f |pmid=20041656 |bibcode=2010JAChS.132..922X }}</ref>