机构地区: 韶关学院英东农业科学与工程学院
出 处: 《精细化工》 2013年第8期948-952,共5页
摘 要: 该文合成了两个以双氰基二苯乙烯为母体的D-π-A型双光子荧光染料,并以其作为模型化合物对双氰基与末端取代基对双光子吸收的影响进行了系统研究。两个化合物(DMO和DMA)具有大的双光子吸收截面(δ)。含有末端氨基的DMA较末端甲氧基的DMO具有更长的发射波长〔λem(DMA)=554 nm>λem(DMO)=459 nm〕、更大的双光子吸收截面〔δ(DMA)=3 650 GM>δ(DMO)=830 GM〕和更高的荧光量子产率〔η(DMA)=0.456>η(DMO)=0.294〕。理想的末端取代基不是烷氧基而是取代氨基。这类双氰基二苯乙烯染料拥有小的分子尺寸、大的δ(830~3 650 GM)、长的发射波长(459~554 nm)和大的斯托克斯位移(St)(131~150 nm),是比较理想的用于双光子荧光标记和探针的发色团。 Two dicyanostilbene-derived two-photon fluorescence(TPF) dyes with a D-π-A architecture were synthesized as the model compounds to systematically study the effect of the dicyano and the terminal substituent on the two-photon absorption (TPA). These two compounds (DMO and DMA ) exhibit very large two-photon absorption cross sections (δ). DMA with the terminal dimethylamino group has longer emission wavelength [λem( DMA ) = 554 nm 〉 λem ( DMO ) = 459 nm ], larger δ[δ(DMA) = 3 650 GM 〉 δ ( DMO ) = 830 GM ] and higher fluorescence quantum yield (η( DMA ) = 0. 456 〉 η( DMO ) = 0. 294 ] than with the terminal methoxy group. The ideal terminal substituent should not be the alkoxy group but the substituted amino group. This class of dicyanostilbene dyes possess small molecule size,large δ(830- 3 650 GM),long-wavelength emission(459 -554nm) and large Stokes shift( 131 -150 nm) ,and are ideal chromophores for TPF labels and probes.
关 键 词: 双氰基二苯乙烯 双光子吸收截面 双光子染料 生物成像 特种染料与颜料
领 域: [化学工程]