Substituted mono- and poly-phenyl-core monomers and polymers thereof for volume bragg gratings

A compound of any one of Formulas I-IV:

• wherein in Formulas I-IV:
• R is at each independent occurrence hydrogen or a substituent comprising one or more groups selected from optionally substituted alkyl, optionally substituted heteroalkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted cycloalkyl, optionally substituted heterocycloalkyl, optionally substituted aryl, optionally substituted arylalkyl, optionally substituted heteroaryl, optionally substituted heteroarylalkyl, hydroxy, halo, cyano, trifluoromethyl, trifluoromethoxy, nitro, trimethylsilanyl, optionally substituted epoxide, optionally substituted glycidyl, optionally substituted acrylate, optionally substituted methacrylate, —ORa, —SRa, —OC(O)—Ra, —N(Ra)2, —C(O)Ra, —C(O)ORa, —C(O)SRa, —SC(O)Ra, —OC(O)ORa, —OC(O)N(Ra)2, —C(O)N(Ra)2, —N(Ra)C(O)ORa, —N(Ra)C(O)Ra, —N(Ra)C(O)N(Ra)2, —N(Ra)C(NRa)N(Ra)2, —N(Ra)S(O)tRa, —S(O)tRa, —S(O)tORa, —S(O)tN(Ra)2, —S(O)tN(Ra)C(O)Ra, —O(O)P(ORa)2, and —O(S)P(ORa)2, wherein two adjacent R substituents can bond or fuse to form a ring;
• t is 1 or 2;
• Ra is independently selected at each occurrence from hydrogen, optionally substituted alkyl, optionally substituted heteroalkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted cycloalkyl, optionally substituted heterocycloalkyl, optionally substituted aryl, optionally substituted arylalkyl, optionally substituted heteroaryl, and optionally substituted heteroarylalkyl;
• an
• wherein the compound of any one of Formulas I-IV comprises at least one R substituent comprising at least one polymerizable or crosslinkable group.