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Film sensor of a ligand-functionalized cellulose nanofiber for the selective detection of copper and cesium ions
Polymer Journal ( IF 2.8 ) Pub Date : 2020-06-23 , DOI: 10.1038/s41428-020-0377-y
Astrid Rahmawati , Chuang-Fu Shih , Toyoko Imae

A fluorescence sensor film for metal ion detection was prepared from a 2,2,6,6-tetramethyl-1-piperidinyloxy radical-oxidized cellulose nanofiber (TOCNF), which was chemically immobilized the metal ion selective ligand, namely, 3,5-bis(((2-hydroxynaphthalen-1-yl)methylene)amino)benzoic acid. The ligand in the TOCNF/ligand films exhibited fluorescence at a 310 nm excitation wavelength and at an ~410 nm emission wavelength. Then, the sensing efficiency and limits were evaluated from the fluorescence of the metal ion-bound ligand. The Stern–Volmer plot of the fluorescence emission intensity of the films increased with increasing of Cu 2+ or Cs + concentration. Accordingly, the sensing of metal ions was more effective on TOCNF with a greater amount of ligand, the sensing of Cu 2+ was superior to that of Cs + , and the detection range of the TOCNF/ligand film was wider for Cu 2+ than for Cs + . Thus, although the sensitivity of this sensor is lower than the electrochemical detection previously reported, the noticeable potential of the current sensing system is that it is a film type to be easily removable from the sensing water and there is no remaining sensing residue in the water. A fluorescence film sensor film was prepared from 2,2,6,6-tetramethyl-1-piperidinyloxy radical-oxidized cellulose nanofiber, which was chemically immobilized by the Cu 2+ - or Cs + -selective ligand, 3,5-bis(((2-hydroxynaphthalen-1-yl)methylene)amino)benzoic acid. The potential of the current sensor is that it is a film-type sensor with facile removal from test water without leaving sensing residue in the water.

中文翻译:

用于选择性检测铜和铯离子的配体功能化纤维素纳米纤维薄膜传感器

以 2,2,6,6-四甲基-1-哌啶氧基自由基氧化纤维素纳米纤维(TOCNF)为原料制备金属离子检测荧光传感薄膜,该纤维化学固定金属离子选择性配体,即 3,5-双(((2-羟基萘-1-基)亚甲基)氨基)苯甲酸。TOCNF/配体薄膜中的配体在 310 nm 激发波长和 ~410 nm 发射波长下表现出荧光。然后,根据金属离子结合配体的荧光评估传感效率和限制。薄膜荧光发射强度的 Stern-Volmer 图随着 Cu 2+ 或 Cs + 浓度的增加而增加。相应地,金属离子对TOCNF的感知在配体量更大的情况下更有效,Cu 2+ 的感知优于Cs + ,并且TOCNF/配体膜的检测范围对于Cu 2+ 比对于Cs + 更宽。因此,虽然该传感器的灵敏度低于之前报道的电化学检测,但当前传感系统的显着潜力是它是一种薄膜类型,可以很容易地从传感水中去除,并且水中没有残留的传感残留物. 由 2,2,6,6-四甲基-1-哌啶氧基自由基氧化纤维素纳米纤维制备荧光薄膜传感器薄膜,该纳米纤维由 Cu 2+ - 或 Cs + - 选择性配体 3,5-bis( ((2-羟基萘-1-基)亚甲基)氨基)苯甲酸。电流传感器的潜力在于它是一种薄膜型传感器,可以轻松地从测试水中去除,而不会在水中留下感应残留物。尽管该传感器的灵敏度低于之前报道的电化学检测,但当前传感系统的显着潜力在于它是一种薄膜类型,可以很容易地从传感水中去除,并且水中没有残留的传感残留物。由 2,2,6,6-四甲基-1-哌啶氧基自由基氧化纤维素纳米纤维制备荧光薄膜传感器薄膜,该纳米纤维由 Cu 2+ - 或 Cs + - 选择性配体 3,5-bis( ((2-羟基萘-1-基)亚甲基)氨基)苯甲酸。电流传感器的潜力在于它是一种薄膜型传感器,可以轻松地从测试水中去除,而不会在水中留下感应残留物。尽管该传感器的灵敏度低于之前报道的电化学检测,但当前传感系统的显着潜力在于它是一种薄膜类型,可以很容易地从传感水中去除,并且水中没有残留的传感残留物。由 2,2,6,6-四甲基-1-哌啶氧基自由基氧化纤维素纳米纤维制备荧光薄膜传感器薄膜,该纳米纤维由 Cu 2+ - 或 Cs + - 选择性配体 3,5-bis( ((2-羟基萘-1-基)亚甲基)氨基)苯甲酸。电流传感器的潜力在于它是一种薄膜型传感器,可以轻松地从测试水中去除,而不会在水中留下感应残留物。电流传感系统的显着潜力在于它是一种薄膜类型,可以很容易地从传感水中去除,并且水中没有残留的传感残留物。由 2,2,6,6-四甲基-1-哌啶氧基自由基氧化纤维素纳米纤维制备荧光薄膜传感器薄膜,该纳米纤维由 Cu 2+ - 或 Cs + - 选择性配体 3,5-bis( ((2-羟基萘-1-基)亚甲基)氨基)苯甲酸。电流传感器的潜力在于它是一种薄膜型传感器,可以轻松地从测试水中去除,而不会在水中留下感应残留物。电流传感系统的显着潜力在于它是一种薄膜类型,可以很容易地从传感水中去除,并且水中没有残留的传感残留物。由 2,2,6,6-四甲基-1-哌啶氧基自由基氧化纤维素纳米纤维制备荧光薄膜传感器薄膜,该纳米纤维由 Cu 2+ - 或 Cs + - 选择性配体 3,5-bis( ((2-羟基萘-1-基)亚甲基)氨基)苯甲酸。电流传感器的潜力在于它是一种薄膜型传感器,可以轻松地从测试水中去除,而不会在水中留下感应残留物。它被 Cu 2+ - 或 Cs + - 选择性配体,3,5-双(((2-羟基萘-1-基)亚甲基)氨基)苯甲酸化学固定。电流传感器的潜力在于它是一种薄膜型传感器,可以轻松地从测试水中去除,而不会在水中留下感应残留物。它被 Cu 2+ - 或 Cs + - 选择性配体,3,5-双(((2-羟基萘-1-基)亚甲基)氨基)苯甲酸化学固定。电流传感器的潜力在于它是一种薄膜型传感器,可以轻松地从测试水中去除,而不会在水中留下感应残留物。
更新日期:2020-06-23
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