4、ePOSScompoundshadcrystallinestructures.SEMobservationfurtherdirectlyrevealedthecrystallinestructuresandOVPOSScouldformcubiccrystalsonascalefromseveralmicrometerstodozens of micrometers.TGAresultsrevealedthatallthethreeexhibitedhighthermostability.Theinitialtempe