Photochromic spiroindolinobenzothiopyrans having a methacryloxymethyl group have been prepared and their colored forms were demonstrated to be a zwitterionic structure on the basis of the spectroscopic data.
[EN] REVERSIBLY SWITCHABLE SURFACTANTS AND METHODS OF USE<br/>[FR] TENSIOACTIFS COMMUTABLES DE MANIÈRE RÉVERSIBLE ET PROCÉDÉS D'UTILISATION DE CEUX-CI
申请人:WARNER BABCOCK INST FOR GREEN CHEMISTRY LLC
公开号:WO2017223413A1
公开(公告)日:2017-12-28
Disclosed herein are reversibly-switchable surfactants and methods of extracting natural products, coating surfaces, cleaning laundry, and osmotic extraction using same.
本文公开了可逆开关表面活性剂及其使用方法,包括提取天然产物、涂覆表面、清洗衣物和渗透萃取等。
Spirooxazine photochromic compounds
申请人:Kureha Kagaku Kogyo Kabushiki Kaisha
公开号:US05017698A1
公开(公告)日:1991-05-21
Disclosed herein is a photochromic compound comprising a spirooxazine compound represented by the following general formula (I): ##STR1## wherein R.sup.1 means an alkyl, allyl or alkoxyalkyl group, or a substituted or unsubstituted aralkyl or aryloxyalkyl group, R.sup.2 and R.sup.3 individually denote a substituted or unsubstituted alkyl group, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 stand individually for a hydrogen or halogen atom, or an alkyl, alkoxy, hydroxy, alkoxyalkyl, or substituted or unsubstituted amino group. A photochromic composition comprising the photochromic compound and a phenol derivative, fluorine-containing alcohol or hindered amine type light stabilizer is also disclosed.
Potential response and its photoresponse for plasticized-poly(vinyl chloride) membranes containing a lipophilic crowned spirobenzopyran were surveyed and compared with those for membrane systems of a spirobenzopyran deriative not carrying any crown ether moiety. On UV-light irradiation, an intriguing type of time-course change was found with the membrane potential for the crowned spirobenzopyran system in the presence of alkali metal ions, i.e., the potential first increases and then decreases. The photoresponse profile for the crowned spirobenzopyran system was affected considerably by the sort of metal ions and the pH conditions of aqueous phases. This phenomenon is explained by an ion-exchange mechanism specific to crowned spirobenzopyran, that is, fast proton exchange followed by slow metal-ion exhange of its merocyanine form. The system for the corresponding spirobenzopyran without crown ether moiety exhibited a steady potential photoresponse that depends on the pH conditions of aqueous phases.
Ionic spiropyran and photochromic clay conjugate comprising the same
申请人:Nissho Iwai Bentonite Co., Ltd.
公开号:US05782969A1
公开(公告)日:1998-07-21
Present invention provides ionic spiropyran compounds having a C10-C22 alkyl group or groups at the 1'- and/or 8-positions of 3',3'-dimethyl-6-nitrospiro\x9b2H-1-benzopyran-2',2'-indoline! and a composite material made by conjugating the said ionic spiropyrans with clay mineral, the said composite material being capable of forming a transparent thin film which is photo-interconvertible between the said spiropyrans and the corresponding merocyanines.