For 10 points, identify this element, the oxide of which makes up the backbone of nucleic acids and is an essential component of the head groups of the lipid bilayers that make up cell membranes, and which is the namesake of a light-emission phenomenon it does not itself exhibit often paired with fluorescence.
A compound containing this element bound to phenyl groups is used with diethyl azodicarboxylate to catalyze the Mitsunobu reaction. A high-density form of this element is obtainable through recrystallization from lead and is named for Hittorf, while other allotropes include a stabilized network solid called "red," while its best-known form is an extremely volatile tetrahedron called "white." For 10 points, identify this element, the oxide of which makes up the backbone of nucleic acids and is an essential component of the head groups of the lipid bilayers that make up cell membranes, and which is the namesake of a light-emission phenomenon it does not itself exhibit often paired with fluorescence.
A compound containing this element bound to phenyl groups is used with diethyl azodicarboxylate to catalyze the Mitsunobu reaction.
{phosphorus}