Norbornadiene–quadricyclane — an effective molecular system for the storage of solar energy

Photoisomerization of Norbornadiene to Quadricyclane Using Ti-Containing Photocatalysts

“…Many efforts have been done to drive this photoisomerization using longer light and improve the quantum yield, which can be categorized into three directions: use of sensitizer, modification of NBD molecule and use of NBD-containing compounds. Dubonosov et al already presented two comprehensive reviews on the photoisomerization of NBD and its derivatives in 1991 and 2001 (Bren' et al, 1991;Dubonosov et al, 2002). This chapter focuses on the synthesis of QC from NBD, so only a brief summary is given to the direct photoisomerization of NBD, i.e.…”

“…It continues to be an interesting field as potential way for storage and conversion for solar energy (Hammond et al, 1964;Bren' et al, 1991;Dubonosov et al, 2002). The photoisomerization of NBD results in metastable structure that contains highly strained cyclobutane and two cyclopropane fragments.…”

“…Photoisomerization of NBD in the presence of sensitizers generally proceeds via triplet state mechanism (Bren' et al, 1991;Dubonosov et al, 2002), see Scheme 4. Under irradiation, the sensitizer is excited to triplet state ( 3 S) via single state ( 1 S), that subsequently transfers energy to NBD molecules and excites it to triplet state ( 3 NBD).…”

Steric effect studies on solar energy storage of norbornadiene-quadracyclane system: DFT calculations

“…The conversion of quadricyclane, 2, to norbornadiene, 1, leads to generate heat energy. The 1/2 system is used for solar energy storage [5][6][7], in molecular switching [8][9][10], in optoelectronic devices [11][12][13][14], as a data storage compound [15,16], as photodynamic chemosensor for metal cations [17,18], as a potential photoresponsive organic magnet [19][20][21] and as an energetic binder for solid rocket propellants [22]. Use of sensitizers and chromophores on 1/2 system are two developments to maximize the solar energy storage [23].…”

Synthesis and Crystal Structure of Chloro{bis[N,N'-(2-chlorobenzylidene)]-ethylenediamine}(triphenylphosphine)]copper(I)

“…This is mainly due to the potential application of these complexes in catalytic processes, 1 photosensitization reactions, 2 lightharvesting studies, 3 and the design of supramolecular arrays. 4 The steric, electronic, and conformational effects imparted by the coordinated ligands play an important role in modifying the properties of the prepared metal complexes.…”