About: Spiropyran

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A spiropyran is a type of organic chemical compound, known for photochromic properties that provide this molecule with the ability of being used in medical and technological areas. Spiropyrans were discovered in the early twentieth century. However, it was in the middle twenties when Fisher and Hirshbergin observed their photochromic characteristics and reversible reaction. In 1952, Fisher and co-workers announced for the first time photochromism in spiropyrans. Since then, there have been many studies on photochromic compounds that have continued up to the present.

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  • Spiropyrany jsou termální reverzibilní fotochromické , které se pod vlivem tepla vracejí do jejich původní formy (nitrospiropyrany dávají zpětnou reakci ve tmě již v průběhu 10 minut při pokojové teplotě). Spiropyranová forma (SP) sloučeniny je bezbarvá na rozdíl od merokyaninové formy (MC), která je barevná. Při izomerizací jde o elektronové přeskupení a vytvoření konjugovaného systému. "Spiro" uhlík v sp3 hybridizaci prochází díky přesunu π elektronů na uhlík v sp2 hybridizaci, který má v prostoru planární uspořádání. Po ozáření světlem vazba mezi "spiro" uhlíkem a kyslíkem zanikne, kruh se otevře a dojde k rotaci aromatické benzenové části. (cs)
  • A spiropyran is a type of organic chemical compound, known for photochromic properties that provide this molecule with the ability of being used in medical and technological areas. Spiropyrans were discovered in the early twentieth century. However, it was in the middle twenties when Fisher and Hirshbergin observed their photochromic characteristics and reversible reaction. In 1952, Fisher and co-workers announced for the first time photochromism in spiropyrans. Since then, there have been many studies on photochromic compounds that have continued up to the present. (en)
  • スピロピラン (Spiropyran) は、有機化合物の一種で、フォトクロミック特性で知られており、医療および技術分野での使用が可能である。スピロピランは20世紀初頭に発見された。しかし、フィッシャーとHirshberginがフォトクロミック特性とその可逆性を観察したのは1920年代半ばであった。1952年、フィッシャーと共同研究者は、スピロピランのフォトクロミズムを初めて発表した。それ以来、現在まで続いているフォトクロミック化合物に関する多くの研究がある。 (ja)
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  • A spiropyran is a type of organic chemical compound, known for photochromic properties that provide this molecule with the ability of being used in medical and technological areas. Spiropyrans were discovered in the early twentieth century. However, it was in the middle twenties when Fisher and Hirshbergin observed their photochromic characteristics and reversible reaction. In 1952, Fisher and co-workers announced for the first time photochromism in spiropyrans. Since then, there have been many studies on photochromic compounds that have continued up to the present. (en)
  • スピロピラン (Spiropyran) は、有機化合物の一種で、フォトクロミック特性で知られており、医療および技術分野での使用が可能である。スピロピランは20世紀初頭に発見された。しかし、フィッシャーとHirshberginがフォトクロミック特性とその可逆性を観察したのは1920年代半ばであった。1952年、フィッシャーと共同研究者は、スピロピランのフォトクロミズムを初めて発表した。それ以来、現在まで続いているフォトクロミック化合物に関する多くの研究がある。 (ja)
  • Spiropyrany jsou termální reverzibilní fotochromické , které se pod vlivem tepla vracejí do jejich původní formy (nitrospiropyrany dávají zpětnou reakci ve tmě již v průběhu 10 minut při pokojové teplotě). (cs)
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  • Spiropyran (cs)
  • スピロピラン (ja)
  • Spiropyran (en)
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