Hiki i nā mea hoʻoheheʻe Ultraviolet ke komo i ke kukui ultraviolet ma muli o ke ʻano o ka ʻōnaehana uila π-conjugated i loko o ka mole o kēia ʻano hui a me ke ʻano e hiki ke hoʻoneʻe i nā mana hydrogen. Aia kekahi mau hihia kahi o ka hapa mua wale nō. Loaʻa i nā mea hoʻoheheʻe Ultraviolet ma kahi liʻiliʻi hoʻokahi -hydroxy phenyl substituent i loko o ka mole. Ma kēia ʻano pūhui, ua hoʻokumu ʻia ke apo chelate e ka hui ortho-hydroxy a me ka atom nitrogen a i ʻole ka ʻātoma oxygen. Ma hope o ka lawe ʻana i ke kukui ultraviolet, haki ka paʻa hydrogen a hiki mai ka isomerism molecular. , Ke komo nei ka ʻōnaehana intramolecular i ka haʻalulu wela, ua haki ka paʻa hydrogen, wehe ʻia ke apo chelating, a hoʻololi ke ʻano intramolecular, i hoʻololi ʻia ke kukui ultraviolet ʻino i ka ikehu wela ʻino e hoʻokuʻu ʻia, a laila e pale ai i ka mea. No nā benzophenone i hoʻohana mau ʻia a No nā mea hoʻoheheʻe ultraviolet benzotriazole, hiki ke hōʻike ʻia ke ʻano o luna e kēia ʻano: benzophenone, benzotriazole.
Ma kēia kaʻina hana, ʻo ke apo chelating i hana ʻia i loko o ka mole ke kī i kāna hana ultraviolet. ʻO ke ākea o ka ikehu o ka wehe ʻana i kēia apo, ʻo ia ke ʻano o ka ikehu ultraviolet o 290-400 nm ka lōʻihi.
Eia kekahi, ma ke ʻano he ultraviolet absorber, ʻaʻole hiki iā ia ke hana i nā hopena photochemical ma lalo o ka hana o ke kukui ultraviolet a i ʻole ke kukui ʻike ʻia; he kūpaʻa maikaʻi i nā kemika a me ka wai, a maikaʻi ke kūpaʻa wela; haʻahaʻa volatility; ka launa pū me nā mea polymer He mau waiwai maikaʻi kona a ʻaʻole i unuhi ʻia e nā solvents. Hiki ke hoʻohana ʻia nā mea hoʻohui wale nō e kū ana i nā kūlana i luna e like me nā mea hoʻopau ultraviolet.
Wahi a ka hoʻolālā kemika, hiki ke hoʻokaʻawale ʻia nā mea hoʻoheheʻe UV i benzotriazoles, benzophenones, triazines, salicylates a me cyanoacrylates, etc.
