Dual-mode oxygen-sensing based on oxygen-adduct formation at cobaltporphyrin–polymer and luminescence quenching of pyrene: an optical oxygen sensor for a practical atmospheric pressure
Dual-mode oxygen-sensing based on oxygen-adduct formation at cobaltporphyrin–polymer and luminescence quenching of pyrene: an optical oxygen sensor for a practical atmospheric pressure
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DOI：
10.1039/b716073a
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发表时间：
2008-02
影响因子：
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通讯作者：
T. Hyakutake;I. Okura;K. Asai;H. Nishide
中科院分区：
文献类型：
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作者：
T. Hyakutake;I. Okura;K. Asai;H. Nishide
将聚合物连接的钴卟啉（CoP）与1-芘丁酸（Py）结合，制备了一种双模非stern - volmer型氧压敏涂层：CoP的快速可逆氧（O2）加合物的结合伴随着可见的吸收光谱变化和Py与氧的发光猝灭。在10-21 kPa的实际大气氧气压力下，CoP/Py组成的氧传感器具有显著的高氧敏感性。Py吸附在阳极氧化铝基体上。它的发光被氧猝灭，服从传统的斯特恩-沃尔默方程。制备了乙烯基氯化物与1-乙烯基咪唑、1-乙烯基-2-甲基咪唑和4-乙烯基吡啶（分别为1、2和3）的共聚物，为第一发光Py层提供氧屏障涂层，并为调节氧加合物形成平衡提供CoP连接。在发光的Py层上再涂上第二层聚合物层，氧障聚合物涂层增强了Py层的Stern-Volmer型发光强度。含钴聚合物第二层的可见光吸收随氧加合物的形成或氧分压的增加而增加，两者重叠并降低了Py层的发光。发光总量随氧分压的增加而减小，产生非斯特恩-沃尔默型响应或对氧分压的高灵敏度。
A dual-mode and a non-Stern–Volmer type oxygen pressure-sensitive coating was prepared by combining the cobaltporphyrin (CoP) ligated with a polymer and 1-pyrenebutyric acid (Py): the combination of the rapid and reversible oxygen (O2)-adduct formation of the CoP was accompanied by a visible absorption spectral change and luminescence quenching of Py with oxygen. The oxygen sensor composed of CoP/Py was successfully characterized by a significantly high oxygen sensitivity under the practical atmospheric oxygen pressure of 10–21 kPa. Py was adsorbed on an anodized aluminium substrate. Its luminescence decreased by quenching with oxygen which obeyed the conventional Stern–Volmer equation. Copolymers of vinylidenechloride with 1-vinylimidazole, 1-vinyl-2-methylimidazole, and 4-vinylpyridine (1, 2 and 3, respectively) were prepared to provide both an oxygen-barrier coating for the first luminescent Py layer and CoP ligation for tuning the oxygen-adduct formation equilibrium. The luminescent Py layer was further coated with a second polymer layer: The oxygen-barrier polymer coating enhanced the Stern–Volmer type luminescence intensity from the Py layer. Visible absorption of the CoP-containing polymer second layer increased in response to the oxygen-adduct formation or oxygen partial pressure, which overlapped and reduced the luminescence from the Py layer. The sum of the luminescence decreased along with an increase in the oxygen partial pressure, yielding a non-Stern–Volmer type response or high sensitivity to the oxygen partial pressure.