Pyrene-to-porphyrin excited singlet energy transfer in LBL-deposited LDH nanosheets
Pyrene-to-porphyrin excited singlet energy transfer in LBL-deposited LDH nanosheets
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DOI：
10.1142/s1088424607000485
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发表时间：
2007-06
影响因子：
1.5
通讯作者：
Tatsuto Yui;T. Kameyama;Takayosi Sasaki;T. Torimoto;K. Takagi
中科院分区：
文献类型：
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作者：
Tatsuto Yui;T. Kameyama;Takayosi Sasaki;T. Torimoto;K. Takagi
采用层层沉积法制备了层状双氢氧化物(LDH)纳米片与四(4-羧基苯基)卟啉(TCPP)和1，3，6，8-吡喃四磺酸(PTSA)两种阴离子染料分子的纳米有序杂化薄膜。研究了两种不同堆积结构的TCPP/LDH/PTSA杂化薄膜的光致能量传递(PET)，即：(A)PTSA/LDH多层膜独立堆积在TCPP/LDH多层膜上形成(TCPP/LDH)n/(PTSA/LDH)n和(B)TCPP/LDH和PTSA/LDH单层交替沉积形成[(TCPP/LDH)/(PTSA/LDH)]n杂化薄膜，这两种杂化薄膜都是通过改变(TCPP/LDH)和(PTSA/LDH)单元层的连续和交替堆积而制备的。在(tcpp/ldh)3/(pss/ldh)m/(ptsa/ldh)3杂化膜(m=1−10)中，光化学惰性的聚苯乙烯磺酸(Pss)与ldh杂化层之间插入(pss/ldh)m，即(ptcp/ldh)3层与(ptsa/ldh)3层之间插入(pss/ldh)m，从而显著地影响了ptsa/ldh杂化薄膜的效率。
Nano-ordered hybrid films of layered double hydroxide (LDH) nanosheets and two types of anionic dye molecules, i.e. tetrakis(4-carboxyphenyl)porphyrin (TCPP) and 1,3,6,8-pyrenetetrasulfonic acid (PTSA), were prepared by a layer-by-layer deposition (LBL) method. Photo-induced energy transfers (PET) between the PTSA and TCPP layers were investigated for two differently stacked structures of the TCPP/LDH/PTSA hybrid films, i.e. (a) PTSA/LDH multilayers independently stacked on the TCPP/LDH multilayers to form (TCPP/LDH)n/(PTSA/LDH)n and (b) TCPP/LDH and PTSA/LDH monolayers deposited alternately to form [(TCPP/LDH)/(PTSA/LDH)]n hybrid films, which were both prepared by varying the successive and alternate stacking of the (TCPP/LDH) and (PTSA/LDH) unit layers. A Foerster type resonance energy transfer is observed in the present hybrid films, where the efficiency of PET was strongly affected by changing the distance between the TCPP and PTSA molecules in the (TCPP/LDH)3/(PSS/LDH)m/(PTSA/LDH)3 hybrid films (m = 1−10) obtained by the insertion of the photochemically inert poly(styrenesulfonic acid) (PSS) and LDH hybrid layers, i.e. the insertion of (PSS/LDH)m between the (TCPP/LDH)3 and (PTSA/LDH)3 layers.